Background - To evaluate the role of BMI values before each L. S. spine radiograph and to choose the optimum radiation exposure factors without compromised the radiographic image quality. The data of BMI values of each patient’s and radiation exposure values like mAs & kVp were collected. This study was based on the observation analysis of BMI values with radiation exposure parameters like mAs & kVp. Forty patients were added to this study. Out of which, 26 were female and 14 male patients were added. Result - In the result, the exposure factors were used in the first two categories i.e. normal BMI and overweight BMI were found optimum with good anatomical details and good quality radiographs. But in the rest three BMI categories i.e Pre-Obese, Pre-obese 1, and Obese, the radiation exposure factors were not found appropriate in different BMI values/categories. Conclusion - The study concludes that blind selection of radiation exposure factors (mAs & kVp) for each X-Ray procedure, is unprofessional behavior of radiographer. Appropriate radiation exposure chart, the amount of radiation dose can be reduced by 20–30% without compromising the radiographic image quality.

Introduction: - CT is a modality used in imaging of internal structures/ organs by the use of radiation. HRCT is an examination protocol in CT for Lungs and Temporal bone. As HRCT uses thin slices so it provides detailed information which helps in better diagnosis. Aim and Objective:- To evaluate the Role of HRCT Chest in differentiation of pattern of spectrum in lung diseases to find out the different patterns in lung diseases. Methods & Materials:- The study was conducted on a period of 6 months on 30 patients. 16 slice CT machine was used for the scanning and thin sections were acquired by using HRCT protocols. Result:- In out of 30 patients, the common findings are Ground Glass Opacities, Tree In Bud Appearance, Reticular Opacities, Honey Combing, Consolidation Nodular Opacities. Conclusion:- HRCT chest is most important and valuable in diagnosis of lung diseases even when chest X-ray is normal. It is capable of imaging the lung with excellent spatial resolution and provides good anatomical detail.