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TECHNICAL CHARACTERISTICS OF MDCT IMAGING IN LIVER TRAUMA AT VIETDUC HOSPITAL
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Abstract
Objectives: The study was to investigate the technical characteristics of multi-detector computed tomography (MDCT) imaging in liver trauma (LT) at VietDuc Hospital. Subjects and Methods: A descriptive study was conducted to analyze the imaging features of MDCT in LT at Viet Duc Hospital from March to April 2023. Results: The study included 95 patients (70 males and 25 females) with an average age of 36.2 ± 15.95 years (ranging from
10 to 73 years). Out of these, 89 patients (97.3%) underwent MDCT imaging using a 16-row MDCT (GE), while the remaining patients were used either a 16- row MDCT (Siemens) or a 64-row MDCT (GE), accounting for 6.4%. The most frequently used contrast agent was Ultravist, administered to 92 patients (96.8%). Omnipaque and Iopamiro were used in 2.1% and 1.1%, respectively. Postcontrast administration, 73 patients (76.8%) were scanned within 30 seconds, 11.6% were scanned after 30s, and the remaining 11.6% had indeterminate timing. In the portal phase, scanning was performed between 60
-70s in 55 patients (57.9%), while 24 patients (25.3%) were scanned in < 60s. Delayed phase was conducted in 84 patients, with 49 of them (51.6%) being scanned after 3 minutes. A total of 76 patients had their radiation dose measured on the MDCT scans. Patients who underwent 4-phase scanning (pre- contrast + arterial + portal venous + delayed phase) had an average dose-length product (DLP) of 1680.99
± 346.89 mGy.cm (ranging from 576.54 mGy.cm to 2374.16 mGy.cm). For patients who underwent 3- phase scanning (without the delayed phase), the average DLP was 1344.86 ± 247.04 mGy.cm (ranging from 837.66 mGy.cm to 1709.65 mGy.cm) (p<0.01). The average CT effective dose (CTEd) for 4-phase scanning was 23.5 ± 4.85 mSv, while for 3-phase scanning was 18.8 ± 3.46 mSv (p<0.01). Conclusion: The MDCT imaging technique in liver trauma at VietDuc Hospital needs to be optimized to ensure optimal visualization of injuries and minimize radiation exposure to patients.
Article Details
Keywords
MDCT technique, CT, dose-length product, CT effective dose.
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