New Patient Classification for Acceptable Quality Dose in CT Examinations

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 396

نسخه کامل این مقاله ارائه نشده است و در دسترس نمی باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

RSMED01_007

تاریخ نمایه سازی: 30 دی 1397

چکیده مقاله:

Purpose: To determine the Acceptable quality dose (AQD) by applying the two classifying groups: patients’ weight and body mass index (BMI) for chest and abdomen/pelvis CT examinations. Method: The AQD values for each CT examination type is averaged dose indices obtained for weight groups of patients having CT images with clinically acceptable quality in order to optimize the patient doses. In this study, the AQD values were determined for two types of classification based on: (1) patients’ weight with 10 kg interval as recommended in the literatures; and (2) patients’ BMI with WHO classification as a new classification proposed in this study. The volume CT dose index (CTDI) and dose length product (DLP) of 100 patients undergoing chest and abdomen/pelvis CT examinations were collected from a 16 slice CT scanner. The AQD values were calculated for two type of classification and compared. Results: The patients’ weight and BMI range from 36-103 kg and 15.17-43.59 kg/m2 respectively. The AQD values of respectively CTDI Vol and DLP determined for 7 weight groups ranged from 4.08-16.2 mGy and 175.75-609.8 mGy.cm for chest and 6.46-25.6 mGy and 318-785.5 mGy.cm for abdomen/pelvis examination. The corresponding AQD values for 5 BMI groups were 5.58-16.2 mGy and 180.18-609.8 mGy.cm for chest and 6.78-25.6 mGy and 291.7-785.5 mGy.cm for abdomen/pelvis examination. Conclusion: The AQD values obtained from the weight groups differ from the BMI groups. As the new CT scanners apply the dose modulation to reduce the patients’ dose, it seems that the BMI classification is more applicable for AQD calculation since the BMI (considering both of weight and height) is more correlated to the patients’ physical dimensions.

نویسندگان

Ali Mehdipour

Department of Radiology, Faculty of Paramedicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran

Masoumeh Parsi

Department of Radiology, Faculty of Paramedicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran

Faezeh-Sadat Khorram

Department of Radiology, Faculty of Paramedicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran