Clinical trial NCT00328510: Comparing Two Forms of Head Immobilization for Stereotactic Radiotherapy
Official title: A Randomized Trial Comparing Two Forms of Immobilization of the Head for Fractioned Stereotactic Radiotherapy
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE3
Conditions: Patients Receiving Fractionated Stereotactic Radiotherapy
for Brain Tumors
Keywords: Stereotactic radiotherapy
Lead sponsor: Thomas Jefferson University
Sponsor class: OTHER
First posted: 2006-05-22
Enrollment: 83
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Fractionated stereotactic radiotherapy (SRT) requires extremely precise and reproducible immobilization of the patient's head. This randomized study compares the efficacy of two commonly used forms of immobilization used for SRT.

Detailed description: PRIMARY OBJECTIVE:

1) To compare the efficacy of two commonly used, generally accepted forms of immobilization for the treatment of lesions in the head with fractionated stereotactic radiotherapy. Specifically, this study will use the ExacTRAC kilovoltage imaging system to assess positioning accuracy for these two systems.

OUTLINE:

Two routinely used methods of immobilization, which differ in their approach to reproduce head position from day-to-day are the Gill-Thomas-Cosman (GTC)frame and the BrainLab thermoplastic mask. The GTC frame fixates on the patient upper detention and thus us in direct mechanical contact with the cranium. The BrainLab mask is a two-part masking system custom-fitted to the front and back of the participant's head. After patients sign an IRB-approved informed consent form, eligible participants are either randomized to either the GTC frame or the mask for their course of SRT. Participants are treated as per standard procedure; however, prior to each treatment, a set of digital kV images (ExacTrac, BrainLabAB, Germany) is taken. These images are fused with reference digitally constructed radiographs obtained from treatment planning CT to yield lateral, longitudinal, and vertical deviations of isocenter and head rotations about respective axes. The primary endpoint of the study is to compare the two systems with respect to mean and standard deviations (SDs) using the distance to isocenter measure.

Eligibility criteria: Inclusion Criteria:

* Patients who are eligible for fractionated stereotactic radiotherapy

Exclusion Criteria:

* Severe claustrophobia

Primary outcomes:
measure: Distance From Ideal to Center of GTC Frame and BrainLab Thermoplastic Mask With Respect to Average and Variability
timeFrame: Measurements taken during SRT
Secondary outcomes:
Other outcomes:
Locations:
city: Philadelphia
country: United States
facility: Thomas Jefferson University Hospital
state: Pennsylvania
Study officials:
affiliation: Thomas Jefferson University
name: Maria Werner-Wasik, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Shiu A, Parker B, Ye JS, Lii J. An integrated treatment delivery system for CSRS and CSRT and clinical applications. J Appl Clin Med Phys. 2003 Autumn;4(4):261-73. doi: 10.1120/jacmp.v4i4.2496.
citation: Burton KE, Thomas SJ, Whitney D, Routsis DS, Benson RJ, Burnet NG. Accuracy of a relocatable stereotactic radiotherapy head frame evaluated by use of a depth helmet. Clin Oncol (R Coll Radiol). 2002 Feb;14(1):31-9. doi: 10.1053/clon.2001.0001.
citation: Lopatta E, Liesenfeld SM, Bank P, Wurm R, Gunther R, Wiezorek T, Wendt TG. [Improved patient repositioning accuracy by integrating an additional jaw fixation into a high precision face mask system in stereotactic radiotherapy of the head]. Strahlenther Onkol. 2003 Aug;179(8):571-5. doi: 10.1007/s00066-003-0941-3. German.