Comparison of Image Quality of Low Voltage 64-slice Multidetector CT Angiography with the Standard Condition in Patients Suspected of Pulmonary Embolism
محل انتشار: مجله فیزیک پزشکی ایران، دوره: 15، شماره: 4
سال انتشار: 1397
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 411
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شناسه ملی سند علمی:
JR_IJMP-15-4_006
تاریخ نمایه سازی: 18 تیر 1398
چکیده مقاله:
Introduction: Reduction of peak kilovoltage (kV) setting has been a useful approach to d creating radiation dose; however, it may have varied effects on noise and the accuracy of diagnosis. Thus, we compared image quality between low (80 kV) and standard kilovoltage (100 kV) protocols. Material and Methods: This triple blind non-randomized parallel quasi-experimental study was conducted on 140 cases of questionable pulmonary embolism. Results: Image quality was twice as high as the standard protocol in the 80-kV group (odds ratio=2.08). Main, segmental, and subsegmental arteries showed significantly higher vascular enhancement (P<0.001) in the 80-kV group. Similarly, the mean number of measurable segmental arteries was significantly greater in the 80-kV group relative to the standard group. On the other hand, the mean of image noise was significantly higher in the 80-kV group in comparison with the 100-kV group (mean: 68.4 vs. 43.1; P<0.001). Finally, the mean of radiation dose received in the 80-kV group was significantly lower than that in the 100-kV group (mean: 0.94 vs. 2.43 mSv; P<0.001). Conclusion: Lower radiation dose received and higher image quality, but worse image noise, in the 80-kV group compared to the 100-kV group present acceptable evidence in support of reduction of voltage in cases with the suspicion of pulmonary embolism. In these patients, therefore, it is recommended as a good strategy to be adopted in computed tomography angiography.
کلیدواژه ها:
نویسندگان
Mohammad Davoodi
MD, Department of Radiology, Ahvaz Jondishapur University of Medical Sciences, Khuzestan, Iran
Soudabeh Belash-Abadi
MD, Ahvaz Jondishapur University of Medical Sciences, Khuzestan, Iran
Seyed Hossein Aalaei-Andabili
MD, Nikan Health Researchers Institute, Tehran, Iran
Ali Kabir
MD, PhD, Minimally Invasive Surgery Research Center, Iran University of Medical Sciences, Tehran, Iran.
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