The Use of Ultrasound Imaging in the External Beam Radiotherapy Workflow of Prostate Cancer Patients

Table 2

Studies reporting on the use of TPUS imaging with the Clarity Autoscan system for intrafraction prostate motion monitoring. The first column details the first author and publication year. The second column details the used system, while the third and fourth column indicate the number of patients and scans examined, respectively. The fifth column contains the examined time intervals in seconds, while the final column details some results and conclusions.

First author	System	# pts	# US scans	Time [sec]	Results and conclusions
Baker (2016) [26]	TPUS	10	51	120–150	(i) Largest displacement (2.8 mm) in posterior direction; (ii) Displacement insignificant during treatment time; (iii) Displacement increases over time
Richardson (2017) [27]	TPUS	20	526	385	(i) Posterior motion seems most common; (ii) 35% of patients displacement > 10 mm; (iii) Duration of displacement varies considerably between patients
Guillet (2017) [28]	TPUS	10	330	140 (+120 setup)	(i) Largest movement in AP direction; (ii) Dosimetric impact increases with treatment time duration
				290 (+120 setup)