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Titolo:
Assessment of accuracy of daily set-ups in prostate radiotherapy using electronic imaging
Autore:
Stryker, JA; Shafer, J; Beatty, RE;
Indirizzi:
Penn State Univ, Milton S Hershey Med Ctr, Dept Radiol, Hershey, PA 17033 USA Penn State Univ Hershey PA USA 17033 , Dept Radiol, Hershey, PA 17033 USA
Titolo Testata:
BRITISH JOURNAL OF RADIOLOGY
fascicolo: 858, volume: 72, anno: 1999,
pagine: 579 - 583
Fonte:
ISI
Lingua:
ENG
Soggetto:
VERIFICATION FILMS; PATIENT SETUP; PORTAL IMAGES; IRRADIATION; CANCER; THERAPY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Stryker, JA Penn State Univ, Milton S Hershey Med Ctr, Dept Radiol, Hershey, PA 17033 USA Penn State Univ Hershey PA USA 17033 l, Hershey, PA 17033 USA
Citazione:
J.A. Stryker et al., "Assessment of accuracy of daily set-ups in prostate radiotherapy using electronic imaging", BR J RADIOL, 72(858), 1999, pp. 579-583

Abstract

The purpose of the study was to assess the accuracy, using electronic portal imaging, of daily set-ups in patients undergoing radiotherapy for prostate carcinoma. We used a scanning liquid ion chamber to assess the accuracy of set-ups in 25 consecutive patients undergoing a 61/2 week course of radiotherapy to the prostate. Electronic images (EPIs) were collected during 33treatments to each of four ports. The positions of anatomical structures on the EPIs were compared with the same structures seen on digitally reconstructed radiographs (DRRs) made after CT simulation before beginning radiotherapy. Displacements of the EPIs compared with the DRRs were computer-calculated in milimetres in lateral, longitudinal and rotational directions for each port. II patients had ports moved because of discrepancies between theEPIs and the DRRs; eight required moves in the first five treatments to correct systematic (simulator) errors. In the right-left and anterior-posterior directions, nearly 95% of the EPIs were within 5 mm of the simulated port position. In the superior-inferior direction, 98% of the ports were within 5 mm of the simulated port position. Two patients had in-plane rotationalerrors on the lateral ports (8 degrees and 10 degrees respectively). It was concluded that daily electronic imaging is an effective technique for assessing the accuracy of set-ups in prostate radiotherapy.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 21:22:47