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Routine chest and abdominal high-pitch CT: An alternative low dose protocol with preserved image quality


Amacker, N A; Mader, C; Alkadhi, H; Leschka, S; Frauenfelder, T (2012). Routine chest and abdominal high-pitch CT: An alternative low dose protocol with preserved image quality. European Journal of Radiology, 81(3):e392-e397.

Abstract

OBJECTIVE: To investigate the radiation dose and image quality of the high-pitch dual source computer tomography (DSCT) for routine chest and abdominal scans. METHODS: 130 consecutive patients (62 female, 68 male, median age 55 years) were included. All patients underwent 128-slice high-pitch DSCT (chest n=99; abdomen n=84) at a pitch of 3.2. Two observers independently rated image quality using a 4-point score (1: excellent to 4: non-diagnostic). Image noise was measured and operational radiation dose quantities were recorded. An additional group of 132 patients (chest, n=80; abdomen n=52) scanned with standard-pitch CT matched for age, gender, and body mass index (BMI) served as control group. RESULTS: Interobserver agreement for image quality rating was good (k=0.74). Subjective image quality of high-pitch CT was diagnostic in all patients (median score chest; 2, median score abdomen: 2). Image noise of high-pitch CT was comparable to standard-pitch for the chest (p=0.32) but increased in the abdomen (p<0.0001). For high-pitch CT radiation dose was 4.4±0.9mSv (chest) and 6.5±1.2mSv (abdomen). These values were significantly lower compared to standard-pitch CT (chest: 5.5±1.2mSv; abdomen: 11.3±3.8mSv). CONCLUSION: Based on the technical background high-pitch dual source CT may serve as an alternative scan mode for low radiation dose routine chest and abdominal CT.

OBJECTIVE: To investigate the radiation dose and image quality of the high-pitch dual source computer tomography (DSCT) for routine chest and abdominal scans. METHODS: 130 consecutive patients (62 female, 68 male, median age 55 years) were included. All patients underwent 128-slice high-pitch DSCT (chest n=99; abdomen n=84) at a pitch of 3.2. Two observers independently rated image quality using a 4-point score (1: excellent to 4: non-diagnostic). Image noise was measured and operational radiation dose quantities were recorded. An additional group of 132 patients (chest, n=80; abdomen n=52) scanned with standard-pitch CT matched for age, gender, and body mass index (BMI) served as control group. RESULTS: Interobserver agreement for image quality rating was good (k=0.74). Subjective image quality of high-pitch CT was diagnostic in all patients (median score chest; 2, median score abdomen: 2). Image noise of high-pitch CT was comparable to standard-pitch for the chest (p=0.32) but increased in the abdomen (p<0.0001). For high-pitch CT radiation dose was 4.4±0.9mSv (chest) and 6.5±1.2mSv (abdomen). These values were significantly lower compared to standard-pitch CT (chest: 5.5±1.2mSv; abdomen: 11.3±3.8mSv). CONCLUSION: Based on the technical background high-pitch dual source CT may serve as an alternative scan mode for low radiation dose routine chest and abdominal CT.

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15 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Diagnostic and Interventional Radiology
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2012
Deposited On:30 Mar 2012 06:28
Last Modified:05 Apr 2016 15:24
Publisher:Elsevier
ISSN:0720-048X
Publisher DOI:10.1016/j.ejrad.2011.12.017
PubMed ID:22226852
Permanent URL: http://doi.org/10.5167/uzh-55541

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