title: Effect of ultrasound probe on dose delivery during real-time ultrasound-guided tumor tracking.
abstract: 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.
authors.affiliation: Dept. of Radiat. Oncology, Maryland Univ. Sch. of Med., Baltimore, MD 21201, USA.
authors.forename: Jianzhou
authors.initials: J
authors.lastname: Wu
authors.forename: O
authors.initials: O
authors.lastname: Dandekar
authors.forename: D
authors.initials: D
authors.lastname: Nazareth
authors.forename: Peng
authors.initials: P
authors.lastname: Lei
authors.forename: W
authors.initials: W
authors.lastname: D'Souza
authors.forename: R
authors.initials: R
authors.lastname: Shekhar
mesh_terms: 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