Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-55541
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.
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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.
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > University Hospital Zurich > Clinic for Diagnostic and Interventional Radiology|
|DDC:||610 Medicine & health|
|Deposited On:||30 Mar 2012 08:28|
|Last Modified:||09 Dec 2012 14:14|
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