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Titolo:
Multi-slice abdominal CT in oncological patients. Influence of table feed and detector configuration on image quality and radiation exposure
Autore:
Wessling, J; Fischbach, R; Ludwig, K; Juergens, KU; Schaller, S; Fallenberg, EM; Lenzen, H; Heindel, W;
Indirizzi:
Univ Klinikum Munster, Inst Klin Radiol, D-48129 Munster, Germany Univ Klinikum Munster Munster Germany D-48129 , D-48129 Munster, Germany
Titolo Testata:
ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN
fascicolo: 4, volume: 173, anno: 2001,
pagine: 373 - 378
SICI:
1438-9029(200104)173:4<373:MACIOP>2.0.ZU;2-H
Fonte:
ISI
Lingua:
GER
Soggetto:
HELICAL CT; SPIRAL CT; COMPUTED-TOMOGRAPHY; ABDOMEN;
Keywords:
multi-detector CT; CT-image quality; tumor staging; abdomen;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Wessling, J Univ Klinikum Munster, Inst Klin Radiol, Albert Schweitzer Str33, D-48129Munster, Germany Univ Klinikum Munster Albert Schweitzer Str 33Munster Germany D-48129
Citazione:
J. Wessling et al., "Multi-slice abdominal CT in oncological patients. Influence of table feed and detector configuration on image quality and radiation exposure", ROFO-F RONT, 173(4), 2001, pp. 373-378

Abstract

Purpose: To evaluate the image quality and radiation exposure of differentspiral CT scanning parameters for routine staging examination of the abdomen in oncologic patients using a multi-slice CT scanner. Methods/Materials:Examination of 40 patients in 4 groups on a multislice CT scanner (SomatomVolumeZoom, Siemens AG, Forch-heim), Functional detector width (4 x 2.5, 4x 5 mm) and pitch (table feed in relation to collimated slice width) were varied (3 and 5). Tube voltage (120 kV), effective tube current (160 mAs), slice-thickness (6mm), increment (4mm), kernel (B30), and contrast injection parameters were kept constant. Axial images were assessed by three radiologists regarding delineation of. anatomic structures, artifacts, and overall image quality. Results: Significantly reduced image quality especially due to artifacts was observed using a 5 mm detector configuration with a pitch of 5 (scan time 9 sec), Image quality was rated best for a 2.5 mm detector configuration with a pitch of 3 and a scan time of 28 sec. The effective dose was independent of the pitch. However, the mean effective dose was 9% higher using the smaller detector configuration (9.9 mSv vs 10.9 mSv), Conclusions: for routine staging CT of the abdomen use of a 4 x 2.5 mm detectorconfiguration with a pitch between 3 and 5 is recommended. A 4 x 5 mm detector configuration using overlapping data acquisition can also be recommended, but additional thin slice reformations are not possible.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 09:14:52