Clinical trial NCT05049551: Thyroid Uptake Quantification on a New Generation of Gamma Camera
Official title: Quantitative Analysis of 99mTc-Pertechnetate Thyroid Uptake With a Large Field CZT Gamma Camera: Feasibility and Comparison Between SPECT/CT and Planar Acquisitions
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Hyperthyroidism
Keywords: thyroid
uptake
quantification
CZT
Planar
SPECT/CT
Lead sponsor: Centre Hospitalier Princesse Grace
Sponsor class: OTHER
First posted: 2021-09-20
Enrollment: 23
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: OTHER
Time perspective: RETROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Twenty-three consecutive participants referred in our nuclear medicine department for hyperthyroidism

Brief summary: The primary objective of this study is to evaluate the potential of a new large field CZT gamma camera to estimate the thyroid uptake (TU) on Single photon emission computed tomography (SPECT) and SPECT/CT images in comparison with standard planar scintigraphy.

The secondary objective is to analyze the diagnostic contribution of SPECT/CT imaging.

Detailed description: Planar and SPECT/CT scintigraphy will be performed on a new generation large field CZT gamma camera and thyroid uptake (TU) value will be calculated on planar acquisition for 23 consecutive patients referred in our department for hyperthyroidism.

With a quantitative approach using attenuation, scatter correction and iterative algorithm with resolution recovery we will have the possibility to calculate the TU value with SPECT or SPECT/CT acquisitions.

Our primary objective will be to evaluate the potential of a new large field CZT gamma camera to estimate the thyroid uptake on SPECT (Tomography without attenuation correction) and SPECT/CT (tomography with attenuation correction) acquisitions compared with standard planar scintigraphy as a gold standard.

The secondary objective will be to analyze the diagnostic contribution of SPECT/CT images.

To established this study it will be necessary to introduce cross-calibration factors performed from a thyroid phantom, for planar and SPECT acquisitions, to estimate the thyroid uptake values.

Eligibility criteria: Inclusion Criteria:

* Hyperthyroidism confirmed by blood test (TSH) and thyroid ultrasound

Exclusion Criteria:

* Pregnant women

Primary outcomes:
measure: Thyroid uptake
timeFrame: Inclusion
Secondary outcomes:
measure: SPECT/CT
timeFrame: Inclusion
Other outcomes:
Locations:
city: Monaco
country: Monaco
facility: Centre Hospitalier Princesse Grace
Study officials:
References:
citation: Ritt P, Vija H, Hornegger J, Kuwert T. Absolute quantification in SPECT. Eur J Nucl Med Mol Imaging. 2011 May;38 Suppl 1:S69-77. doi: 10.1007/s00259-011-1770-8. Epub 2011 Apr 12.
citation: Gnesin S, Leite Ferreira P, Malterre J, Laub P, Prior JO, Verdun FR. Phantom Validation of Tc-99m Absolute Quantification in a SPECT/CT Commercial Device. Comput Math Methods Med. 2016;2016:4360371. doi: 10.1155/2016/4360371. Epub 2016 Dec 14.
citation: Giovanella L, Avram AM, Iakovou I, Kwak J, Lawson SA, Lulaj E, Luster M, Piccardo A, Schmidt M, Tulchinsky M, Verburg FA, Wolin E. EANM practice guideline/SNMMI procedure standard for RAIU and thyroid scintigraphy. Eur J Nucl Med Mol Imaging. 2019 Nov;46(12):2514-2525. doi: 10.1007/s00259-019-04472-8. Epub 2019 Aug 7.
citation: Mariani G, Tonacchera M, Grosso M, Orsolini F, Vitti P, Strauss HW. The Role of Nuclear Medicine in the Clinical Management of Benign Thyroid Disorders, Part 1: Hyperthyroidism. J Nucl Med. 2021 Mar;62(3):304-312. doi: 10.2967/jnumed.120.243170. Epub 2020 Oct 2.