JMRS ASMIRT CPD Q&A - Radiation Therapy

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JMRS ASMIRT CPD Q&A - Radiation Therapy - March 2021

Maximise your CPD by reading the following selected Radiation Therapy article and answer the five questions.

Continuing Professional Development Q&A - Radiation Therapy

Intrafraction cone beam computed tomography verification of breath hold during liver stereotactic radiation therapy

Brown E, Muscat E, O’Connor P, Liu H, Lee Y, Pryor D. (2021) J Med Radiat Sci.

https://doi.org/10.1002/jmrs.441

1. For the purposes of this article, intrafraction imaging is? *

1 point

a. Cone beam computed tomography (CBCT) acquisition simultaneous with MV treatment delivery

b. A series of KV images acquired as the gantry rotates around the patient

c. KV images acquired at pre-determined gantry angles during treatment

d. A CBCT acquired after the completion of the first treatment beam

2. In this study, which one of the following was not part of the criteria used to determine a patient’s suitability for breath hold? *

1 point

a. Able to hold their breath for a minimum of 15 seconds

b. Able to follow prompts from staff

c. Able to hold their breath for a minimum 25 seconds

d. Establish a regular breathing pattern

3. This study found that diaphragmatic feathering: *

1 point

a. Was far greater in deep-inspiration breath hold (DIBH) patients

b. Decreased as treatment progressed

c. Was not observed in this patient cohort

d. Was at its largest at fraction 3

4. What did the study highlight as important to the success of breath hold Stereotactic body radiation therapy (SBRT) for liver treatment? *

1 point

a. Ability of patients to hold their breath for an extended period of time

b. Multiple coaching sessions

c. Comprehensive understanding of breath hold

d. Appropriate patient selection

5. Future investigations into breath hold SBRT liver treatment does not include which of the following? *

1 point

a. Evaluating the value of multiple coaching sessions

b. Markerless real-time tracking

c. Reduction in treatment verification imaging

d. Identification of predictive factors to better select suitable patients

Recommended further reading:

1. Bedos L, Riou, O, Aillères N, Braccini A, Molinier J, Llacer Moscardo C, et al. Evaluation of reproducibility of tumor repositioning during multiple breathing cycles for liver stereotactic body radiotherapy treatment. Rep Pract Oncol Radiother. 2017 Mar-Apr; 22(2):132-140. https://doi.org/10.1016/j.rpor.2016.07.007

2. Choi GW, Suh Y, Das P, Herman J, Holliday E, Koay E, et al. Assessment of setup uncertainty in hypofractionated liver radiation therapy with a breath-hold technique using automatic image registration–based image guidance. Radiat Oncol. 2019 Aug; 14:154. https://doi.org/10.1186/s13014-019-1361-6

3. Naumann P, Batista V, Farnia B, Fischer J, Liermann J, Tonndorf-Martini E, et al. Feasibility of optical surface-guidance for position verification and monitoring of stereotactic body radiotherapy in deep-inspiration breath-hold. Front Oncol. 2020 Sep; 10: 2080. https://doi.org/10.3389/fonc.2020.573279

This content was created in conjunction with the Australian Society of Medical Imaging and Radiation Therapy (ASMIRT) CPD Program.

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