PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 465925

A computerized three-dimensional treatment planning system utilizing interactive colour graphics.

D L McShan·A Silverman·D M Lanza·L E Reinstein·A S Glicksman
View original source ↗Export metadata ↓

Abstract

A new computerized radiation treatment planning system has been developed to aid in three-dimensional treatment planning. Using interactive colour graphics in conjunction with a DPD 11/45 computer, the system can take multiple transverse contours and construct a perspective display of the treatment region showing organ surfaces as well as cross-sectional contours. With interactively selected orientations, the display allows easy perception of the relative positioning of the treatment volume and neighbouring anatomy. For external beam treatment planning, interactive computer simulation is used to select diaphragm sizes which best conform to the target area while avoiding sensitive structures. Dose calculations for the selected beams are carried out on multiple transverse planes. The calculational planes and surfaces are displayed in perspective with radiation dosage displayed in an interactively manipulated colour display. Altogether the system provides an easy assessment of the volume to be irradiated, interactive selection of optimal arrangements of treatment fields and a means for visualizing and evaluating the resulting dose distributions.

Explore related subjects

ColorComputersData DisplayHumansOnline SystemsPatient Care PlanningRadiotherapy DosageJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

D L McShan, A Silverman, D M Lanza, L E Reinstein, A S Glicksman. 1979. A computerized three-dimensional treatment planning system utilizing interactive colour graphics.. https://doi.org/10.1259/0007-1285-52-618-478

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1992

Readability and sensitivity of a new faecal occult blood test in a hospital ward environment. Comparison with an established test.

OBJECTIVE: To compare the readability and sensitivity of a new guaiac faecal occult blood test, HemoccultSENSA, with those of a standard guaiac-based test, Hemoccult, in a normal working environment. DESIGN: The two tests were performed in parallel on routine clinical and contrived faecal specimens; those developing the tests were blinded as to the test type. SETTING: All tests were carried out in the hospital ward environment under normal conditions by nurses working in the ward. SAMPLES: Fifty faecal samples from healthy volunteer subjects (low concentrations of haemoglobin were added to 40 of these samples) and 145 faecal samples from 65 inpatients likely to have gastrointestinal bleeding. MAIN OUTCOME MEASURES: Test positivity rate, and graded measures of colour intensity, colour stability and colour pattern. RESULTS: With patients' samples, the new test gave a greater number of positive results than the standard test (73.1% v. 65.5%; 95% confidence interval of the difference, 3.3%-11.9%). With contrived samples, the blue colour produced during development was more intense (P less than 0.0003), more stable (P less than 0.0025) and covered a larger area (P less than 0.01) with the new test compared with the standard test. CONCLUSIONS: These results demonstrate the better readability and slightly higher sensitivity of the new test. They justify its use in the ward environment or doctor's office. Patients being tested should consume a low peroxidase diet until the specificity of the new test has been fully evaluated.

Color↗