Curriculum vitae

Name:

Iori Sumida

Place of birth:

Osaka, JAPANCurrent work place:

Accuray, Japan. Division of Marketing and clinicalsolutions.

Title:

Senior Director

Address:

Shin Otemachi Building 7F, 2-2-1 Otemachi, Chiyoda-ku,
Tokyo 100-0004, Japan
Tel: 81-3-6265-1526
Email: isumida@accuray.com

Language:

Japanese, English

Education
Osaka University, Division of Health Sciences.
Apr. 1995 – Mar. 1999. Title: Bachelor degree (BS).
Thesis title: Analysis of primary x-ray spectrum of CT system.
Osaka University Graduate School of Medicine, Division of Health Sciences.
Apr. 1999 – Mar. 2001. Title: Master degree (MS).
Thesis title: Image characteristics of flat panel detector.
Osaka University Graduate School of Medicine, Department of Radiation Oncology.
Apr. 2001 – Mar. 2005. Title: Doctor degree (PhD).
Thesis title: An optimization algorithm of dose distribution using Attraction-Repulsion Model(Application to low-dose-rate interstitial brachytherapy)
University of California, San Francisco. Comprehensive Cancer Center.
Jul. 2003 – Apr. 2004. Visiting scholar supervised by Jean Pouliot.
Work experience
Osaka University Graduate School of Medicine, Department of Radiation Oncology.
Apr. 2005 – Dec. 2005. Medical physics researcher.

Cancer Institute Hospital, Department of Radiation Oncology.
Jan. 2006 – Apr. 2007. Chief medical physicist. Mainly clinical medical physics work.
Osaka University Graduate School of Medicine, Department of Radiation Oncology.
May. 2007 – Mar. 2011. Assistant professor, Chief medical physicist.
Supervise of clinical medical physics training and research for graduate students, and clinicalwork.
Osaka University Graduate School of Dentistry, Department of Diagnostic Imaging and Radiotherapy.
Apr. 2011 – Mar. 2013. Assistant professor, Chief medical physicist.
Supervise of clinical medical physics training and research for graduate students, and clinicalwork.
Osaka University Graduate School of Medicine, Department of Radiation Oncology.
Apr. 2013 – Sep. 2013. Assistant professor, Chief medical physicist.
Oct. 2013 – Mar. 2021. Lecturer, Chief medical physicist.
Supervise of clinical medical physics training and research for graduate students, and clinicalwork.
Accuray Japan. Division of Physics and clinical support.
Apr. 2021 – Sep. 2022. Director
Accuray Japan. Division of Marketing and clinical solutions.
Oct. 2022 – present. Senior Director

Qualification
National license:

Radiation therapist #50195 from Aug. 2000

Japanese Board of Medical Physicist Qualification: Medical physicist (therapeutic) #228 from Oct. 2004
Clinical experience of medical physics: 15 years
This qualification is compliant with the ABR certification.
Reference site

http://www.jbmp.org/english/

Committee of society
Japanese Board of Medical Physicist Qualification (JBMP)
Board-certified committee of medical physics educational courseJapan Society of Medical Physics (JSMP)
Director, Representative, QA committee
Japanese Society for Radiation Oncology (JASTRO)
Representative, Vice chair of QA committee, Medical physicist committee
The Japanese College of Medical Physics (JCMP)
Councilor, Educational committee
Computer Assisted Radiology and Surgery (CARS)
Program committee
Journal Service
Associate editor
Journal of radiation researchRadiological physics and technology
Referee
Med Phys
Int J Radiat Oncol Biol PhysBr J Radiol
Physica Medica
J Radiat Res
Artificial Intelligence In Medicine
Quantitative Imaging in Medicine and Surgery
Radiol Phys Technol-

Peer review paper
1.

Shimamoto S, Inoue T, Shiomi H, Sumida I, Yamada Y, Tanaka E, Inoue T. Cyberknife stereotactic
irradiation for metastatic brain tumors. Radiat Med. 20,299-304 (2002).

2.

Yamada Y, Shiomi H, Sumida I, Suzuki O, Isohashi F, Oh RJ, Tanaka E, Inoue T, Nakamura H.
Quantitative evaluation of the changes of the irradiated lung fields after stereotactic irradiation
with the polygon method. Radiat Med. 22,98-105 (2004).

3.

Sumida I, Shiomi H, Lessard E, Hsu I-C, Pouliot J. Optimization of dose distribution for HDR
brachytherapy of the prostate using attraction-repulsion model. RSNA 90th proceedings. (2004).

4.

Sumida I, Shiomi H, Oh RJ, Tanaka E, Isohashi F, Inoue T, Inoue T. An optimization algorithm ofdose distribution using attraction-repulsion model (application to low-dose-rate interstitialbrachytherapy). Int J Radiat Oncol Biol Phys. 59,1217-1223 (2004).

5.

Sumida I, Takahashi Y, Nose T, Ito A, Yamashita T. Optimization of dose distribution for HDR
brachytherapy of the prostate using attraction-repulsion model. AAPM 48th proceedings. (2006).

6.

Sumida I, Shiomi H, Yoshioka Y, Inoue T, Lessard E, Hsu I-C, Pouliot J. Optimization of dose
distribution for HDR brachytherapy of the prostate using attraction-repulsion model. Int J Radiat

Oncol Biol Phys. 64,643-649 (2006).
7.

Oh R-j, Yoshioka Y, Tanaka E, Sumida I, Isohashi F, Suzuki O, Konishi K, Kawaguchi Y, Nakamura
S, Kato M, Inoue T. High-dose-rate brachytherapy combined with long-term hormonal therapy forhigh-risk prostate cancer: results of a retrospective analysis. Radiat Med. 24,58-64 (2006).

8.

Takahashi Y, Ito A, Sumida I, Kozuka T, Gomi K, Nose T, Ito T, Yamashita T. Dosimetricconsideration of individual 125I source strength measurement and a large-scale comparison of thatmeasured with a nominal value in permanent prostate implant brachytherapy. Radiat Med.
24,675-679 (2006).

9.

Nose T, Komoike Y, Yoshida K, Koizumi M, Motomura K, Kasugai T, Inaji H, Nishiyama K, Koyama
H, Kozuka T, Gomi K, Oguchi M, Akahashi Y, Sumida I, Yamashita T. A pilot study of wider use ofaccelerated partial breast irradiation: intraoperative margin-directed re-excision combined withsole high-dose-rate interstitial brachytherapy. Breast Cancer. 13,289-299 (2006).

10. Yoshioka Y, Konishi K, Oh RJ, Sumida I, Yamazaki H, Nakamura S, Nonomura N, Okuyama A,
Inoue T. High-dose-rate brachytherapy without external beam irradiation for locally advanced
prostate cancer. Radiother Oncol. 80,62-68 (2006).
11. Ito A, Takahashi Y, Sumida I, Yunoki A, Hino Y. Standard dosimetry of 125I seeds against prostatecancer. IFMBE proceedings. 14,2076-2078 (2007).
12. Sumida I, Takahashi Y, Ito A, Nose T, Oguchi M, Yamashita T, Yoshioka Y, Inoue T. Verification of
the source tech medical model STM1251 I-125 air kerma strength in Japan. AAPM 49th proceedings.
(2007).
13. Nose T, Koizumi M, Yoshida K, Nishiyama K, Sasaki J, Ohnishi T, Kozuka T, Gomi K, Oguchi M,

Sumida I, Takahashi Y, Ito A, Yamashita T. In vivo dosimetry of high-dose-rate interstitialbrachytherapy in the pelvic region: use of a radiophotoluminescene glass dosimeter formeasurement of 1004 points in 66 patients with pelvic malignancy. Int J Radiat Oncol Biol Phys.
70,626-633 (2008).
14. Sumida I, Konishi K, Shiomi H, Isohashi F, Yoshioka Y, Inoue T. Evaluation of planned dose using
measured source strength for permanent prostate implant. AAPM 50th proceedings. (2008).
15. Isohashi F, Yoshioka Y, Kouzumi M, Konishi K, Sumida I, Takahashi Y, Ogata T, Morishige K,
Enomoto T, Kawaguchi Y, Kotsuma T, Adachi K, Fukuda S, Akino Y, Inoue T. High-dose-rateinterstitial brachytherapy for previously untreated cervical carcinoma. Brachytherapy. 8,234-239(2009).
16. Konishi K, Yoshioka Y, Isohashi F, Sumida I, Kawaguchi Y, Kotsuma T, Adachi K, Morimoto M,
Fukuda S, Inoue T. Correlation between dosimetric parameters and late rectal and urinary
toxicities in patients treated with high-dose-rate brachytherapy used as monotherapy for prostatecancer. Int J Radiat Oncol Biol Phys. 75,1003-1007 (2009).
17. Sumida I, Koizumi M, Takahashi Y, Ogata T, Akino Y, Isohashi F, Konishi K, Yoshioka Y, Inoue T.
Verification of air-kerma strength of 125I seed for permanent prostate implants in Japan. Int J Clin

Oncol. 14,525-528 (2009).
18. Takahashi Y, Koizumi M, Sumida I, Ogata T, Akino Y, Yoshioka Y, Konishi K, Isohashi F, Ota S,
Inoue T. What is the optimum minimum segment size used in step and shoot IMRT for prostatecancer? J Radiat Res. 51,543-552 (2010).
19. Sumida I, Koizumi M, Takahashi Y, Ogata T, Akino Y, Konishi K, Isohashi F, Yoshioka Y, Inoue T.
Feasibility study for high-energy radiotherapy photon beams using radiochromic film postal
dosimetry audit between multi-institutions. Int J Radiat Oncol Biol Phys proceedings. 1,842 (2010).
20. Ogata T, Koizumi M, Sumida I, Takahashi Y, Akino Y, Isohashi F, Konishi K, Yoshioka Y, Inoue T.
Weekly verification of dosimetric data for virtual wedge using a 2D diode detector array. Med Dosim.
36,246-249 (2011).
21. Yoshioka Y, Konishi K, Sumida I, Takahashi Y, Isohashi F, Ogata T, Koizumi M, Yamazaki H,
Nonomura N, Okuyama A, Inoue T. Monotherapeutic high-dose-rate brachytherapy for prostatecancer: Five-year results of an extreme hypofractionation regimen with 54 Gy in 9 fractions. Int J

Radiat Oncol Biol Phys. 80,469-475 (2011).
22. Akino Y, Koizumi M, Sumida I, Takahashi Y, Ogata T, Ota S, Isohashi F, Konishi K, Yoshioka Y.
Megavoltage cone beam computed tomography dose and the necessity of reoptimization for imaging
dose-integrated intensity-modulated radiotherapy for prostate cancer. Int J Radiat Oncol Biol Phys.
82,1715-1722 (2012).
23. Sumida I, Yamaguchi H, Kizaki H, Ogata T, Takahashi Y, Yoshioka Y. Quality assurance of MLC
leaf position accuracy and relative dose effect at the MLC abutment region using anelectronic portal imaging device. J Radiat Res. 53,798-806 (2012).
24. Takahashi Y, Koizumi M, Sumida I, Isohashi F, Ogata T, Akino Y, Yoshioka Y, Maruoka S, Inoue S,
Konishi K, Ogawa K. The usefulness of an independent patient-specific treatment planning
verification method using a benchmark plan in high-dose-rate intracavitary brachytherapy for
carcinoma of the uterine cervix. J Radiat Res. 53,936-944 (2012).
25. Kakimoto N, Tamaki J, Chidasombatjaroen J, Tsujimoto T, Kataoka M, Tomita S, Shimamoto H,
Sumida I, Nakatani A, Uchiyama Y, Murakami S, Furukawa S. Effects of cepharanthine with orwithout Z-100 against leucopenia during radiation therapy for oral cancer. Oral Radiol. 28,115-120(2012).
26. Yagi M, Ueguchi T, Koizumi M, Ogata T, Yamada S, Takahashi Y, Sumida I, Akino Y, Konishi K,
Isohashi F, Tomiyama N, Yoshioka Y, Ogawa K. Gemstone spectral imaging: determination of CT to
ED conversion curves for radiotherapy treatment planning. J Appl Clin Med Phys. 14,173-186(2013).
27. Akino Y, Ota S, Inoue S, Mizuno H, Sumida I, Yoshioka Y, Isohashi F, Ogawa K. Characteristics offlattening filter free beams at low monitor unit settings. Med Phys. 40,112101-1-7 (2013).
28. Sumida I, Yamaguchi H, Kizaki H, Yamada Y, Koizumi M, Yoshioka Y, Ogawa K, Kakimoto N,
Murakami S, Furukawa S. Evaluation of imaging performance for megavoltage cone-beam CT overan extended period. J Radiat Res. 55,191-199 (2014).
29. Sumida I, Yamaguchi H, Kizaki H, Aboshi K, Yamada Y, Yoshioka Y, Ogawa K. Three-dimensionaldose prediction based on two-dimensional verification measurements for IMRT. J Appl Clin Med

Phys. 15,133-146 (2014).
30. Tamari K, Suzuki O, Hashimoto N, Kagawa N, Fujiwara M, Sumida I, Seo Y, Isohashi F, Yoshioka
Y, Yoshimine T, Ogawa K. Treatment outcomes using CyberKnife for brain metastases from lungcancer. J Radiat Res. 56,151-158(2015).
31. Fujiwara M, Isohashi F, Mabuchi S, Yoshioka Y, Seo Y, Suzuki O, Sumida I, Hayashi K, Kimura T,
Ogawa K. Efficacy and safety of nedaplatin-based concurrent chemoradiotherapy for FIGO Stage
IB2-IVA cervical cancer and its clinical prognostic factors. J Radiat Res. 56,305-314 (2015).
32. Sumida I, Yamaguchi H, Kizaki H, Aboshi K, Tsujii M, Yamada Y, Yagi M, Ogawa K. Incorporationof gantry angle correction for three-dimensional dose prediction in intensity-modulated radiation
therapy. J Radiat Res. 56,594-605 (2015).
33. Shimamoto H, Sumida I, Kakimoto N, Marutani K, Okahata R, Usami A, Tsujimoto T, Murakami S,
Furukawa S, Tetradis S. Evaluation of the scatter doses in the direction of the buccal mucosa fromdental metals. J Appl Clin Med Phys. 16,233-243 (2015).
34. Sumida I, Yamaguchi H, Kizaki H, Aboshi K, Tsujii M, Yoshikawa N, Yamada Y, Suzuki O, Seo Y,
Isohashi F, Yoshioka Y, Ogawa K. Novel radiobiological gamma index for the evaluation of
three-dimensional predicted dose distribution. Int J Radiat Oncol Biol Phys. 92,779-786 (2015).

35. Hayashi K, Isohashi F, Akino Y, Wakai N, Mabuchi S, Suzuki O, Seo Y, Ootani Y, Sumida I,
Yoshioka Y, Kimura T, Ogawa K. Estimation of the total rectal dose of radical external beam andintracavitary radiotherapy for uterine cervical cancer using the deformable image registration
method. J Radiat Res. 56,546-552 (2015).
36. Inohara H, Takenaka Y, Yoshii T, Nakahara S, Yamamoto Y, Tomiyama Y, Seo Y, Isohashi F,
Suzuki O, Yoshioka Y, Sumida I, Ogawa K. Phase 2 Study of Docetaxel, Cisplatin, and Concurrent
Radiation for Technically Resectable Stage III-IV Squamous Cell Carcinoma of the Head and Neck.

Int J Radiat Oncol Biol Phys. 91(5);934-941:2015.
37. Wakai N, Sumida I, Otani Y, Suzuki O, Seo Y, Isohashi F, Yoshioka Y, Hasegawa M, Ogawa K.
Optimization of leaf margins for lung stereotactic body radiotherapy using a flattening filter-freebeam. Med Phys. 42,2125-2131 (2015).
38. Kadoya N, Karasawa K, Sumida I, Arimura H, Yamada S. The current status of education andcareer paths of students after completion of medical physicist programs in Japan: a survey by theJapanese Board for Medical Physicist Qualification. Radiol Phys Technol. 8,278-285 (2015).
39. Anetai Y, Sumida I, Takahashi Y, Yagi M, Ota S, Mizuno H, Ogawa K. Reference respiratory
waveforms by minimum jerk model analysis. Med Phys. 42,5066-5074 (2015).
40. Isohashi F, Mabuchi S, Yoshioka Y, Seo Y, Suzuki O, Tamari K, Yamashita M, Unno H, Kinose Y,
Kozasa K, Sumida I, Otani Y, Kimura T, Ogawa K. Intensity-modulated radiation therapy versus
three-dimensional conformal radiation therapy with concurrent nedaplatin-based chemotherapy
after radical hysterectomy for uterine cervical cancer: comparison of outcomes, complications, anddose-volume histogram parameters. Radiat Oncol. 10:180 (2015).
41. Ota S, Monzen H, Sumida I, Yoshioka Y, Kado R, Inoue S, Ogawa K, Nishimura Y. Quality
improvement in external radiation therapy using a departmental incident reporting system andmultidisciplinary team efforts. J Nucl Med Radiat Ther. 6,243 (2015).
42. Maruoka S, Yoshioka Y, Isohashi F, Suzuki O, Seo Y, Otani Y, Akino Y, Takahashi Y, Sumida I,
Ogawa K. Correlation between patients' anatomical characteristics and interfractional internal
prostate motion during intensity modulated radiation therapy for prostate cancer. SpringerPlus.
4,579 (2015).
43. Yoshioka Y, Suzuki O, Isohashi F, Seo Y, Okubo H, Yamaguchi H, Oda M, Otani Y, Sumida I,
Uemura M, Fujita K, Nagahara A, Ujike T, Kawashima A, Yoshida K, Yamazaki H, Nonomura N,
Ogawa K. High-dose-rate brachytherapy as monotherapy for intermediate- and high-risk prostatecancer: Clinical results for a median eight-year follow-up. Int J Radiat Oncol Biol Phys. 94,675-682(2016).
44. Sumida I, Yamaguchi H, IJ DAS, Kizaki H, Aboshi K, Tsujii M, Yamada Y, Suzuki O, Seo Y,
Isohashi G, Ogawa K. Intensity-modulated radiation therapy dose verification using fluence andportal imaging device. J Appl Clin Med Phys. 17,259-271 (2016).

45. Kurosu K, Sumida I, Mizuno H, Otani Y, Oda M, Isohashi F, Seo Y, Suzuki O, Ogawa K. Curtailing
patient-specific IMRT QA procedures from 2D dose error distribution. J Radiat Res. 57,258-264(2016).
46. Sumida I, Shiomi H, Higashinaka N, Murashima Y, Miyamoto Y, Yamazaki H, Mabuchi N, Tsuda E,
Ogawa K. Evaluation of tracking accuracy of the CyberKnife system using a webcam and printed
calibrated grid. J Appl Clin Med Phys. 17,74-84 (2016).
47. Yoshida K, Yamazaki H, Kotsuma T, Takenaka T, Ueda M, Miyake S, Tsujimoto Y, Masui K,
Yoshioka Y, Sumida I, Uesugi Y, Shimbo T, Yoshikawa N, Yoshioka H, Tanaka E, Narumi Y.
Simulation analysis of optimized brachytherapy for uterine cervical cancer: Can we select the best
brachytherapy modality depending on tumor size? Brachytherapy. 15,57-64 (2016).
48. Isohashi F, Mabuchi S, Akino Y, Yoshioka Y, Seo Y, Suzuki O, Tamari K, Yoshino K, Sawada K,
Ueda Y, Kobayashi E, Sumida I, Mizuno H, Okubo H, Kimura T, Ogawa K. Dose-volume analysis ofpredictors for chronic gastrointestinal complications in patients with cervical cancer treated withpostoperative concurrent chemotherapy and whole-pelvic radiation therapy. J Radiat Res.
57,668-676 (2016).
49. Murakami S, Verdonschot RG, Kakimoto N, Sumida I, Fujiwara M, Ogawa K, Furukawa S.
Preventing complications from high-dose rate brachytherapy when treating mobile tongue cancer
via the application of a modular lead-lined spacer. PLoS One. 11:e0154226 (2016).
50. Sumida I, Yamaguchi H, Das IJ, Kizaki H, Aboshi K, Tsujii M, Yamada Y, Tamari K, Suzuki O, Seo
Y, Isohashi F, Yoshioka Y, Ogawa K. Evaluation of radiobiological gamma index with motion
interplay in tangential IMRT breast treatment. J Radiat Res. 57,691-701 (2016).
51. Nakahara S, Takenaka Y, Ogawa K, Nishiike S, Yamamoto Y, Seo Y, Isohashi F, Suzuki O,
Yoshioka Y, Sumida I, Yoshii T, Tomiyama Y, Inohara H. Phase II study of docetaxel, cisplatin, andconcurrent radiation followed by platinum-based adjuvant chemotherapy for technicallyunresectable, locally advanced head and neck squamous cell carcinoma. Int J Clin Oncol.
21,1030-1037 (2016).
52. Baek S, Isohashi F, Yamaguchi H, Mabuchi S, Yoshida K, Kotsuma T, Yamazaki H, Tanaka E,
Sumida I, Tamari K, Otani K, Seo Y, Suzuki O, Yoshioka Y, Kimura T, Ogawa K. Salvage
high-dose-rate brachytherapy for isolated vaginal recurrence of endometrial cancer. Brachytherapy.
57,691-701 (2016).
53. Kurosu K, Sumida I, Shiomi H, Mizuno H, Yamaguchi H, Okubo H, Tamari K, Seo Y, Suzuki O, Ota
S, Inoue S, Ogawa K. A robust measurement point for dose verification in delivery quality
assurance for a robotic radiosurgery system. J Radiat Res. 10,1-8 (2016).
54. Yamaguchi H, Hori M, Suzuki O, Seo Y, Isohashi F, Yoshioka Y, Sumida I, Uemura M, Fujita K,
Nagahara A, Ujike T, Kawashima A, Nonomura N, Tomiyama N, Ogawa K. Clinical Significance of

the Apparent Diffusion Coefficient Ratio in Prostate Cancer Treatment with Intensity-modulatedRadiotherapy. Anticancer Res. 36,6551-6556 (2016).
55. Sumida I, Yamaguchi H, Das IJ, Kizaki H, Aboshi K, Tsujii M, Yamada Y, Tamari K, Seo Y,
Isohashi F, Yoshioka Y, Ogawa K. Organ-specific modulation complexity score for the evaluation ofdose delivery. J Radiat Res. 13,1-10 (2017).
56. Sumida I, Yamaguchi H, Das IJ, Anetai Y, Kizaki H, Aboshi K, Tsujii M, Yamada Y, Tamari K, Seo
Y, Isohashi F, Yoshioka Y, Ogawa K. Robust Plan Optimization Using Edge-Enhanced Intensity for
Intrafraction Organ Deformation in Prostate Intensity-Modulated Radiation Therapy. PLoS ONE.
12(3): e0173643 (2017).
57. Hamatani N, Sumida I, Takahashi Y, Oda M, Seo Y, Isohashi F, Tamari K, Ogawa K. Three
dimensional dose prediction and validation with radiobiological gamma index based on relative
seriality model for head-and-neck IMRT. J Radiat Res. 58:701-709 (2017).
58. Kadoya N, Karasawa K, Sumida I, Arimura H, Kakinohana Y, Kabuki S, Monzen H, Nishio T,
Shirato H, Yamada S. Educational outcomes of a medical physicist program over the past 10 years
in Japan. J Radiat Res. 58:669-674 (2017).
59. Shimamoto H, Sumida I, Majima M, Senda Y, Usami A, Iwamoto Y, Marutani K, Okahata R,
Tsujimoto T, Kakimoto N, Murakami S. Radiation-induced changes of ADC values for head andneck organs. Oral Surg Oral Med Oral Pathol Oral Radiol. 124,27-28 (2017).
60. Uchiyama Y, Kreiborg S, Murakami S, Tsujimoto T, Sumida I. Changes in the Submandibular
Gland in Patients with Head and Neck Cancer After Radiation Therapy: A Preliminary Study.

Anticancer Res. 37,3239-3242 (2017).
61. Kubo K, Monzen H, Ishii K, Tamura M, Kawamorita R, Sumida I, Mizuno H, Nishimura Y.
Dosimetric comparison of RapidPlan and manually optimized plans in volumetric modulated arc
therapy for prostate cancer. Phys Med. 17,30216-30218 (2017).
62. Nakano H, Minami K, Yagi M, Imaizumi H, Otani Y, Inoue S, Takashina M, Seo Y, Takahashi Y,
Sumida I, Ogawa K, Koizumi M. Radiobiological effects of flattening filter free photon beams on
A549 non-small lung cancer cells. J Radiat Res. 59,442-445 (2018).
63. Kurosu K, Sumida I, Suzuki O, Shiomi H, Ota S, Otani K, Tamari K, Seo Y, Ogawa K. Dosimetricand clinical implications of interfractional and intrafractional correlation errors duringmarker-based real time tumor tracking for liver SBRT. J Radiat Res. 59,164-172 (2018).
64. Wakisaka Y, Yagi M, Sumida I, Takashina M, Ogawa K, Koizumi M. Impact of time-related factors
on biologically accurate radiotherapy treatment planning. Raidat Oncol. 13:30 (2018).
65. Ueda Y, Isono M, Miyazaki M, Konishi K, Kamiura S, Sumida I, Ogawa K, Teshima T. Strategies
for reducing ovarian dose in volumetric modulated arc therapy (VMAT) for postoperative uterine
cervical cancer. Br J Radiol. 91,doi: 10.1259/bjr.20160777 (2018).

66. Koike Y, Sumida I, Mizuno H, Shiomi H, Kurosu K, Ota S, Yoshioka Y, Suzuki O, Tamari K, Ogawa
K. Dosimetric impact of intra-fraction prostate motion under a tumor-tracking system inhypofractionated robotic radiosurgery. PLoS One. 13,e0195296 (2018).
67. Tanaka K, Kajimoto T, Hayashi T, Asanuma O, Hori M, Kamo K, Sumida I, Takahashi Y, Tateoka
K, Bengua G, Sakata K, Endo S. An in vitro veriﬁcation of strength estimation for moving an 125I
source during implantation in brachytherapy. J Radiat Res. 59,484-489 (2018).
68. Akino Y, Sumida I, Shiomi H, Higashinaka N, Murashima Y, Hayashida M, Mabuchi N, Ogawa K.
Evaluation of the accuracy of the CyberKnife Synchrony Respiratory Tracking System using aplastic scintillator. Med Phys. (2018) Jun 1, doi: 10.1002/mp.13028. [Epub ahead of print]
69. Otani Y, Sumida I, Nose T, Shimamoto S, Okubo H, Ogawa K. High-dose rate interstitialbrachytherapy pretreatment dwell position verification using a transparent applicator. J Appl Clin

Med Phys. (2018) Jun 30, doi: 10.1002/acm2.12405. [Epub ahead of print]
70. Tamura M, Monzen H, Matsumoto K, Kubo K, Otsuka M, Inada M, Doi H, Ishikawa K, Nakamatsu
K, Sumida I, Mizuno H, Yoon DK, Nishimura Y. Mechanical performance of a commercial
knowledge-based VMAT planning for prostate cancer. Radiat Oncol. 13: 163, (2018)
71. Otani Y, Shimamoto S, Sumida I, Takahashi Y, Tani S, Oshima T, Onosaka S, Isohashi F, Tamari K,
Ogawa K. Impact of different Ir-192 source models on dose calculations in high-dose-ratebrachytherapy. Phys Imag Radiat Oncol. 7: 23-26, (2018)
72. Tsubouchi T, Yagi M, Sumida I, Tamari K, Seo Y, Ogawa K. The effect of beam shape on physicalparameters of head and neck simultaneous-integrated boost intensity-modulated radiation therapy.

Rep Pract Oncol Radiother. 23: 425-432, (2018)
73. Varnava M, Sumida I, Mizuno H, Shiomi H, Suzuki O, Yoshioka Y, Ogawa K. A new plan quality
objective function for determining optimal collimator combinations in prostate cancer treatment
with stereotactic body radiation therapy using CyberKnife. PLoS One. 13(11):e0208086, (2018)
74. Kawashima A, Isohashi F, Mabuchi S, Sawada K, Ueda Y, Kobayashi E, Matsumoto Y, Otani Y,
Tamari K, Seo Y, Suzuki O, Sumida I, Tomimatsu T, Kimura T, Ogawa K. A 3-year follow-up studyof radiotherapy using computed tomography-based image-guided brachytherapy for cervical cancer.

J Radiat Res. doi: 10.1093/jrr/rry104, (2019)75. Kitamori H, Sumida I, Tsujimoto T, Shimamoto H, Murakami S, Ohki M. Evaluation of mouthpiece
fixation devices for head and neck radiotherapy patients fabricated in PolyJet photopolymer by a 3D
printer. Physica Medica. 58:90-98, 2019.
76. Kaneko A, Sumida I, Mizuno H, Isohashi F, Suzuki O, Seo Y, Otani K, Tamari K, Ogawa K:
Comparison of gamma index based on dosimetric error and clinically relevant dose-volume index
based on three dimensional dose prediction in breast intensity-modulated radiation therapy.
Radiation Oncology. 14:36, 2019.
77. Akino Y, Shiomi H, Sumida I, Isohashi F, Seo Y, Suzuki O, Tamari K, Otani K, Higashinaka N,
Hayashida K, Mabuchi N, Ogawa K. Impacts of respiratory phase shifts on motion-tracking

accuracy of the CyberKnife SynchronyTM Respiratory Tracking System. Med Phys. 46: 3757-66.
2019.
78. Sumida I, Magome T, Kitamori H, Das IJ, Yamaguchi H, Kizaki H, Aboshi K, Yamashita K, Yamada
Y, Seo Y, Isohashi F, Ogawa K. Deep convolutional neural network for reduction ofcontrast-enhanced region on CT images. J Radiat Res. 60: 586-94. 2019.
79. Adachi K, Hayashi K, Kagawa N, Kinoshita M, Sumida I, Akino Y, Shiomi H, Tamari K, Suzuki O,
Hirayama R, Kijima N, Isohashi F, Seo Y, Otani K, Kishima H, Ogawa K. Feasibility of salvage
re-irradiation with stereotactic radiotherapy for recurrent glioma using cyberknife. Anticancer Res.
39: 2935-40. 2019.
80. Akino Y, Tohyama N, Akita K, Ishikawa M, Kawamorita R, Kurooka M, Sumida I, Nakaguchi Y,
Miyaura K, Nakamura M. Modalities and techniques used for stereotactic radiotherapy,
intensity-modulated radiotherapy, and image-guided radiotherapy: A 2018 survey by the Japan
Society of Medical Physics. Phys Med. 64: 182-7. 2019.
81. Koike Y, Ohira S, Akino Y, Sagawa T, Yagi M, Ueda Y, Miyazaki M, Sumida I, Teshima T, Ogawa K.
Deep learning-based virtual non-contrast CT for volumetric modulated arc therapy planning:
Comparison with a dual-energy CT-based approach. Med Phys. doi: 10.1002/mp.13925. 2019.
82. Koike Y, Akino Y, Sumida I, Shiomi H, Mizuno H, Yagi M, Isohashi F, Seo Y, Suzuki O, Ogawa K.
Feasibility of synthetic computed tomography generated with an adversarial network for
multi-sequence magnetic resonance-based brain radiotherapy. J Radiat Res. 61: 92-103. 2019.
83. Ueda Y, Miyazaki M, Sumida I, Ohira S, Tamura M, Monzen H, Tsuru H, Inui S, Isono M, Ogawa K,
Teruki T. Knowledge-based planning for esophageal cancers using a model trained with plans froma different treatment planning system. Acta Oncol. 22: 1-10. 2019.
84. Seo Y, Tamari K, Takahashi Y, Minami K, Isohashi F, Suzuki O, Sumida I, Ogawa K. Impact of
accumulated alterations in driver and passenger genes on response to radiation therapy. Br J Radiol.
2020 May 1;93(1109):20190625.
85. Uchida H, Hirata T, Otani K, Suzuki O, Oda M, Akino Y, Sumida I, Hatano K, Fujita K, Uemura M,
Imamura R, Eino D, Yoshioka Y, Nonomura N, Ogawa K. Assessment of Daily Replanning andGeometrical Variation of High-dose-rate Brachytherapy for the Prostate. Anticancer Res. 2020
Mar;40(3):1677-1682.
86. Sumida I, Magome T, Das IJ, Yamaguchi H, Kizaki H, Aboshi K, Yamaguchi H, Seo Y, Isohashi F,
Ogawa K. A convolution neural network for higher resolution dose prediction in prostate volumetricmodulated arc therapy. Phys Med. 2020 Apr;72:88-95.
87. Ueda Y, Suzuki O, Ohira S, Yagi M, Sumida I, Wada K, Inui S, Isono M, Miyazaki M, Ogawa K,
Teshima T. The Promising Treatment Schedule of Concurrent Chemoradiotherapy for Stage III
Non-small Cell Lung Cancer: Alternative for Conventional Fractionation Using Mathematical
Analysis. Anticancer Res. 2020 Jul;40(7):4095-4104.
88. Ono S, Ueda Y, Ohira S, Isono M, Sumida I, Inui S, Morimoto M, Ashida R, Miyazaki M, Ogawa K,
Teshima T. Detectability of fiducials' positions for real-time target tracking system equipping with astandard linac for multiple fiducial markers. J Appl Clin Med Phys. 2020 Nov;21(11):153-162.
89. Varnava M, Sumida I, Oda M, Kurosu K, Isohashi F, Seo Y, Otani K, Ogawa K. Dosimetriccomparison between volumetric modulated arc therapy planning techniques for prostate cancer inthe presence of intrafractional organ deformation. J Radiat Res. 2021 Mar 10;62(2):309-318.
90. Ueda Y, Monzen H, Fukunaga JI, Ohira S, Tamura M, Suzuki O, Inui S, Isono M, Miyazaki M,
Sumida I, Ogawa K, Teshima T. Characterization of knowledge-based volumetric modulated arc
therapy plans created by three different institutions' models for prostate cancer. Rep Pract Oncol

Radiother. 2020 Nov-Dec;25(6):1023-1028.
91. Shiomi H, Akino Y, Sumida I, Masai N, Oh RJ, Ogawa K. Development of raster scanning IMRT
using a robotic radiosurgery system. J Radiat Res. 2021 Mar 10;62(2):364-373.
92. Isohashi F, Akino Y, Matsumoto Y, Suzuki O, Seo Y, Tamari K, Sumida I, Sawada K, Ueda Y,
Kobayashi E, Tomimatsu T, Nakanishi E, Nishi T, Kimura T, Ogawa K. Dose rate in the highest
irradiation area of the rectum correlates with late rectal complications in patients treated withhigh-dose-rate computed tomography-based image-guided brachytherapy for cervical cancer. J
Radiat Res. 2021 May 12;62(3):494-501.
93. Ueda Y, Tsujii M, Ohira S, Sumida I, Miyazaki M, Teshima T. Residual Set Up Errors of the
Surrogate-guided Registration Using Four-dimensional CT Images and Breath Holding Ones in
Respiratory Gated Radiotherapy for Liver Cancer. In Vivo. 2021 Jul-Aug;35(4):2089-2098.
Non peer review paper
1.

Sumida I, Pouliot J. UCSF Comprehensive Cancer Center –Introduction of radiation oncology
department- Radiology Frontier. May (2004).

Peer review paper in Japanese
1. Yamazaki T, Sumida I, Matsumoto M, Kanamori H, Okamoto H, Kumatani T, Kuroda C, Suzuki T,
Matsumoto T. Analysis of primary x-ray spectrum of CT system. Med Ima Info Sci. 17,88-96 (2001).
2. Matsumoto M, Sumida I, Ideguchi T, Kawagoe Y, Himuro K. Canon’s flat panel detector. Jpn J Med

Phys. 22,232-245 (2002).
3. Sumida I, Yoshioka Y, Tanaka E, Inoue T, Inoue T. Research on dose prescription in high dose rateinterstitial brachytherapy for prostate cancer (I) -Focusing on optimization program-. J Jpn Soc Ther

Radiol Oncol. 15,37-42 (2003).
4. Shiomi H, Sumida I, Oh RJ, Yoshioka Y, Isohashi F, Suzuki O, Konishi K, Kawaguchi Y, Inoue T.
Dose optimization using the attraction-repulsion model (ARM) -Basic study for the HDR simple
model-. J Jpn Soc Ther Radiol Oncol. 17,177-186 (2005).
5. Sumida I, Koizumi M, Okamoto H, Abe Y, Itami J, Kodaka K, Kawamura S, Uno T, Saito H, Endo M.
Correlation between required quality assurance equipment and radiation therapy institutional level.

Jpn J Med Phys. 31,84-89 (2012).
6. Shimamoto H, Kakimoto N, Kitisubkanchana J, Tsujimoto T, Sumida I, Nakatani A, Uchiyama Y,
Murakami S, Furukawa S. Clinical effects of personal Cepharanthine and Z-100 injection on
leucopenia during chemoradiotherapy for oral cancer: Comparison between intra-arterial injection
and intravenous injection chemoradiotherapy. Dental Radiol. 55,60-67 (2015).
7. Shiraishi J, Hashimoto F, Watabe H, Hashido T, Ichikawa K, Yamamoto T, Sumida I, Doi K,
Kawamura S. In order to publish your article in RPT: Authors x Reviewers = Good Science. Nihon

Hoshasen Gijutsu Gakkai Zasshi. 75: 1179-86. 2019.

Non peer review paper in Japanese
1. Sumida I. Accelerated Partial Breast Irradiation

for breast cancer -Physical outline-.

Rinsyo-housyasen. Feb. (2007).
2. Sumida I. Medical physics and quality assurance. Jpn Ijishinpo. 4320, Feb. (2007).
3. Sumida I. Controversial of IGRT. Eizojoho Med. 39,1112-1114 (2007).
4. Sumida I. Handling of Gafchromic film type EBT2. Jpn J Radiol Technol. 66,1367-1375 (2010).
5. Sumida I. Experience of Gafchromic EBT2 film measurement in water. J Radiat Kataroukai.
16,26-32 (2011).
6. Sumida I. QA/QC of MLC. J Radiat Kataroukai. 16,115-122 (2011).
7. Sumida I. QA/QC of treatment planning system. Jpn J Radiol Technol. 67,1342-1348 (2011)．
8. Sumida I. Quantification of medical physicists work. J Radiat Kataroukai. 17,159-163 (2012).
Textbook in medical physics in English
1.

Radiochromic film: Role and applications in radiation dosimetry. Chapter 7. 3DCRT
Commissioning. Sumida I, Barbee D, Das IJ. CRC Press. Taylor & Francis Group.

2.

Artificial intelligence in radiation therapy. Handling editor. On going. IOP. Publishing.

Textbook in medical physics in Japanese
1. Yamashita T, Sumida I. 心配しないでいいですよ 放射線治療. Shinko Trading Company Ltd.,
Publication Department of Medical Books. Dec. (2006).
2. Yamashita T, Sumida I. 放 射 線 腫 瘍 医 に な ろ う . Shinko Trading Company Ltd., Publication
Department of Medical Books. Apr. (2007).
3. Sumida I. Radiation physics. Nanzando. Oct. (2007).
4. Sumida I, Shiomi H. Handbook of medical imaging. Ohmsha. Nov. (2010).
5. Sumida I. Textbook of clinico-radiological technology. Nankodo. pp.82-88, 100-107, 133-141, 155-156.
Feb. (2012).
6. Sumida I. Science and engineering of medical physics. Yokendo. pp.95-102, Aug. (2012).
7. Sumida I. Handbook of treatment planning in radiation oncology. Medical Science International.
pp.15-24. Nov. (2012).
8. Sumida I. Radiotherapy physics. Bunken. Mar. (2016).
Clinical experience
I have started work as a medical physicist since 2004. As I have been presenting the peer-review
journals, I have an experience for external beam radiotherapy (VMAT, IMRT, IGRT) and brachytherapy

(192Ir-HDR, 125I-LDR).
I am familiar with these treatment machines, Varian TrueBeam, Siemens ONCOR and ARTISTE,
Accuray CyberKnife and Tomotherapy. Also I have used the treatment planning systems, Eclipse,
RayStation, Pinnacle, Monaco, XiO, Multiplan, Oncentra, and VariSeed.
I have supervised around 40 graduate students for research projects and have educated clinicalexperience in medical physics through on-the-job training. Japanese board of medical physics (JBMP)
accredits our department as a medical physics course.
Work experience
In Apr. 2021, I moved to Accuray, Japan from Osaka University. Based on the clinical experience in
medical physics over 18 years, currently I work at Accuray, Japan as a senior director to be growth to ourcompany from the marketing and physics and clinical support aspects. Since my major skill is to develop
artificial intelligence in radiation therapy, that has been proved in textbook published from IOP.
Publishing below, my knowledge is going to implement our product and development to gain.