Evaluation of DLP in Brain CT Scan examinations

1. BackgroundAbsorbed doses in tissues are one of the highest doses received by patients in diagnostic radiological methods with brain CT scan, and these doses are often near or greater than dose levels that increase the probability of cancer[1].Therefore, knowing the amount of dose to reduce and optimize the dose to reduce the risks of radiation, including cancer, is very important[2,3,4].For this purpose, the DTC or CTDIw and the dose alongthe Dose Length (DLP) or the Volume CT dose index are suggested quantities for assessing the patient’s dose rate.The purpose of this study was to evaluate the amount of DLP in brain CT scan examinations using the scaling volume index.2. Method The DLP calculation algorithm using the scan length for CT scan examinations and the CTDIvol associated with the scan are as follows: DLP = CTDIvol ScanLength (1-1). 3. ResultsA protocol of 300 male and female patients who had undergone brain CT scans with a Phillips 6-slice braille model. And according to the average irradiation conditions, patients were classified in different age ranges (Table 1-1 and 1-2).DLP is a very good quantity for expressing the total amount of radiation that hits a patient’s body. Therefore, the amount of DLP calculated with the product of the CTDIvol value and the length of thescan area (Equation 1-1) are described in Tables 1-3. 4. Conclusions DLP values indicate that, in addition to the amount of doses that are most affected by the intensity of the voltage tube and the intensity of the current tube in the age range of 5 years and above for male and femalepatients (Tables 1.1,1.2) with the same radiation conditions, the parameter The direct impact on the amount of DLP or the patient’s total dose is the length of the scan.As a result, in order to optimize the patient’s dose rate (DLP), the length of the scan should be limited to the anatomical range and the Effective Diameter [1,2,3,4,5] of the patient’s body should be considered in the age range expressed as well as the radiation protection guidelines and the use of dose optimization techniques is suggested.