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Titolo:
Three-dimensional movement of a liver tumor detected by high-speed magnetic resonance imaging
Autore:
Shimizu, S; Shirato, B; Xo, B; Kagei, K; Nishioka, T; Hashimoto, S; Tsuchiya, K; Aoyama, H; Miyasaka, K;
Indirizzi:
Hokkaidopaniv, Sch Med, Dept Radiol, Kita Ku, Sapporo, Hokkaido 0608638, Ja Hokkaido Univ Sapporo Hokkaido Japan 0608638 apporo, Hokkaido 0608638, Ja
Titolo Testata:
RADIOTHERAPY AND ONCOLOGY
fascicolo: 3, volume: 50, anno: 1999,
pagine: 367 - 370
SICI:
0167-8140(199903)50:3<367:TMOALT>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
TECHNICAL CONSIDERATIONS; RADIATION-THERAPY;
Keywords:
liver; radiotherapy; three-dimensional treatment planning; organ movement;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Shimizu, S Hokkaido608638,Sch Med, Dept Radiol, Kita Ku, N-15,W-7, Sapporo, Hokkaido 0 Hokkaido Univ N-15,W-7 Sapporo Hokkaido Japan 0608638 okkaido 0
Citazione:
S. Shimizu et al., "Three-dimensional movement of a liver tumor detected by high-speed magnetic resonance imaging", RADIOTH ONC, 50(3), 1999, pp. 367-370

Abstract

Objective: Three-dimensional (3D) movement of a spherical liver tumor during respiration was investigated with magnetic resonance imaging (MRI) usinga high-speed sequence. Methods: A marker was placed on the surface of the patient as a reference of distance. Repetition time (TR) was 7.7 ms, echo time (TE) was 4.2 ms, flip angle was 20 degrees, section thickness was 8 mm, and a 256 X 128 matrixwas used. The acquisition time was 1.0 s followed by an interval of 0.5 s. The 20 tumor contours extracted during 30 s were superimposed on sagittal and coronal MR images. Results: The maximum value of tumor edge location was 3.9 cm in the cranio-caudal direction, 2.3 cm in the ventro-dorsal direction, and 3.1 cm in thelateral direction. The mean length of tumor displacement observed was 2.1 cm in the cranio-caudal direction, 0.8 cm in the ventro-dorsal and 0.9 cm in the left-right direction, respectively. The locus of the center of the tumor contour in the sagittal cross section was inclined at 23 degrees and inthe coronal cross section was inclined at 18 degrees to the cranio-caudal axis of body. Conclusion: In conclusion, 3D movement of a spherical liver tumor was detected using rapid MRI sequential examinations. Magnetic resonance imaging has a potential to improve the accuracy of the planning target volume of a liver tumor. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 17:41:25