title: A simple technique for alignment of perineal needle template to ultrasound image grid for permanent prostate implants.
abstract: Proper alignment of a needle template and ultrasound software grid is required to accurately deliver permanent prostate seed implants optimized using pretreatment volume studies. Correct alignment may also reduce tissue edema, morbidity, and the time and labor required to deliver permanent prostate seed implants. A technique has been developed to rapidly assess (and, if necessary, improve) the alignment using a custom-designed water phantom. Verification of needle positions can be conducted within 1 mm and requires less than ten minutes. We have instituted the technique as a part of our periodic quality assurance program.
authors.affiliation: Mallinckrodt Institute of Radiology, Radiation Oncology Center, St. Louis, Missouri 63110, USA.
authors.forename: S
authors.initials: S
authors.lastname: Mutic
authors.forename: D A
authors.initials: DA
authors.lastname: Low
authors.forename: G H
authors.initials: GH
authors.lastname: Nussbaum
authors.forename: J F
authors.initials: JF
authors.lastname: Williamson
authors.forename: D
authors.initials: D
authors.lastname: Haefner
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D001918:Brachytherapy / Q000295:instrumentation* / Q000379:methods / Q000592:standards; D006801:Humans; D008297:Male; D019047:Phantoms, Imaging; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging / Q000532:radiotherapy*; D011785:Quality Assurance, Health Care; D011880:Radiotherapy Planning, Computer-Assisted / Q000592:standards; D012984:Software; D014463:Ultrasonography