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Titolo:
The importance of computed tomography slice thickness in radiographic patient positioning for radiosurgery
Autore:
Murphy, MJ;
Indirizzi:
Stanford Univ, Sch Med, Dept Radiat Oncol, Stanford, CA 94305 USA StanfordUniv Stanford CA USA 94305 Radiat Oncol, Stanford, CA 94305 USA
Titolo Testata:
MEDICAL PHYSICS
fascicolo: 2, volume: 26, anno: 1999,
pagine: 171 - 175
SICI:
0094-2405(199902)26:2<171:TIOCTS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIGITALLY RECONSTRUCTED RADIOGRAPHS; PORTAL IMAGES; REGISTRATION; ALGORITHM; ACCURACY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Murphy, MJ Stanford Univ, Sch Med, Dept Radiat Oncol, Stanford, CA 94305 USA Stanford Univ Stanford CA USA 94305 ol, Stanford, CA 94305 USA
Citazione:
M.J. Murphy, "The importance of computed tomography slice thickness in radiographic patient positioning for radiosurgery", MED PHYS, 26(2), 1999, pp. 171-175

Abstract

A new radiographic patient positioning technique developed for radiosurgery has been analyzed to show the effect of computed tomography (CT) slice thickness on the precision of target localization during treatment. The positioning technique establishes the pose of the patient's anatomy during treatment by comparing treatment room radiographs with digitally reconstructed radiographs derived from a CT study. The measured pose is then used to alignthe x-ray therapy beam with the treatment site, without resorting to mechanical fixation. The technique has been found to be sensitive to submillimeter changes in skull position, which is the level of precision desired for radiosurgery. In this report it is shown that the precision of head localization improves by a factor of 2 when the CT slice thickness is reduced from 3.0 to 1.5 mm. This indicates that, in radiosurgical applications, image-guided beam alignment can be significantly influenced by the spatial resolution of the reference CT study. This result is relevant to all high-precisionradiographic positioning techniques that utilize CT images. (C) 1999 American Association of Physicists in Medicine. [S0094-2405(99)00102-9].

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 15:36:49