Effect of ultrasound probe on dose delivery during real-time ultrasound-guided tumor tracking.
Ultrasound is a noninvasive and less costly modality for real-time imaging of soft tissues. It has the capability of tracking soft tissue at levels of submillimeter precision even in the presence of radiation beams. The effect of a transducer on radiation dose is not fully known. The best imaging location for an ultrasound transducer happens to coincide with the path of an anterior-posterior beam in intensity modulated radiation therapy (IMRT). This study indicates a significant change in dose when this juxtaposition occurs. If the anterior-posterior beam is avoided in IMRT planning, however, the effect of the transducer on radiotherapy is found to be negligible.
Wu
Jianzhou
J
Dept. of Radiat. Oncology, Maryland Univ. Sch. of Med., Baltimore, MD 21201, USA.
Dandekar
O
O
Nazareth
D
D
Lei
Peng
P
D'Souza
W
W
Shekhar
R
R
D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy*; D011859:Radiography; D011879:Radiotherapy Dosage; D011881:Radiotherapy, Computer-Assisted / Q000379:methods*; D012007:Rectum / Q000000981:diagnostic imaging; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging