Automatic seed identification technique for interstitial implants using three isocentric radiographs

Journal Article · Fri Jul 01 04:00:00 EDT 1983 · Med. Phys.; (United States)

DOI:https://doi.org/10.1118/1.595394· OSTI ID:6123113

Rosenthal, M S; Nath, R

A technique for the automatic reconstruction of the spatial coordinates of seeds in an interstitial implant has been developed. Seed coordinates from three isocentric radiographs, an anterior--posterior film, and an orthogonal pair of films taken at gantry angles of +- 45/sup 0/ from the anterior--posterior direction are digitized and recorded in a random sequence. From this, the three-dimensional coordinates of the seeds in the implant are computed by matching the values of common coordinates along the axis of rotation. This rotate and match technique leads to an accurate and consistent identification and reconstruction of seeds with 90% of them within 2 mm of their actual location. These new computer routines have been added to an existing treatment planning system (AECL TP-11 treatment planning system, version 5A). We present our algorithm and technique along with clinical examples.

• Research Organization: A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511
• OSTI ID: 6123113
• Journal Information: Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 10:4; ISSN MPHYA
• Country of Publication: United States
• Language: English

Related Subjects

550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
550604* -- Medicine-- Unsealed Radionuclides in Therapy-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
BIOMEDICAL RADIOGRAPHY
DIAGNOSTIC TECHNIQUES
DISTRIBUTION
IMAGE PROCESSING
IMPLANTS
MEDICINE
NUCLEAR MEDICINE
PROCESSING
RADIATION SOURCE IMPLANTS
RADIATION SOURCES
RADIOLOGY
RADIOTHERAPY
SPATIAL DISTRIBUTION
THERAPY