ABSTRACT: BACKGROUND: A common surgical emergency is acute appendicitis. Various diagnostic tools are available to diagnosis acute appendicitis. Radiological investigations play an important role in making accurate and early diagnosis and thus preventing morbidity associated with the disease. OBJECTIVE: To determine the diagnostic accuracy of gray scale ultrasonography versus color Doppler in suspected cases of acute appendicitis. MATERIALS AND METHODS: The study was carried in the department of Radiology of Mayo Hospital, Lahore. A total of 75 patients were enrolled of age 18-40 years, both genders who were suspected cases of acute appendicitis. All patients underwent baseline investigations along with gray scale ultrasonography and color Doppler. All patients were subjected to surgery to confirm the diagnosis and findings were subjected to statistical analysis. RESULTS: The mean age of the patients was 23.25 ±10.55 and mean transverse diameter of appendix was 8.37 ±3.39. There were 62.7% males and 37.3%females. Findings of gray scale ultrasonography and color Doppler were then correlated with surgical findings to calculate the diagnostic accuracy of these modalities. The results revealed that gray scale ultrasonography sensitivity, specificity, positive predictive value, negative predictive value and accuracy was 92.7%, 94.32%, 95%, 91.4% and 93.3% respectively, whereas color Doppler had sensitivity, specificity, positive predictive value, negative predictive value and accuracy of 97.7%, 93.9%, 95.3%, 97% and 96% respectively. Diagnostic accuracy of both modalities together was 98.6%. CONCLUSION: Color Doppler has better diagnostic accuracy than gray scale ultrasonography for diagnosis of acute appendicitis and the combination of both modalities yields diagnostic accuracy that is similar to gold standard.

High resolution computed tomography scan, in modern years, is more effective than standard computed tomography scan and conventional chest radiography in localization of diseases in the lobule of lung and in the appraisal of pulmonary parenchymal diseases because of high-resolution power and minimal partial volume effect. Objectives: To identify pulmonary tuberculosis in clinically suspected patients by high resolution computed tomography scan of chest. Study Design: Cross Sectional Descriptive study. Setting: Department of Radiology, Mayo Hospital, Lahore. Period: 15th February 2018 to 15th November 2018. Material & Methods: After taking consent, fifty patients, fulfilling inclusion and exclusion criteria, were selected by convenient sampling in this cross sectional descriptive study. Demographic details, clinical history and High resolution tomographic scan findings were documented. Data analysis was performed on Microsoft excel and statistical package for social sciences (SPSS v21) and reported by descriptive statistics. Results: Out of 50 patients, pulmonary tuberculosis was diagnosed in 44(88%) patients, acute on chronic tuberculosis in 2(4%), healed tuberculosis in 2(4%), interstitial lung disease in 1(2%) & post tubercular sequela in 1(2%) patient. Majority were males (n=29, 58%) and most patients belonged to fifth decade of life (n=19, 38%). Overall mean age of patients was 45.14±12.16 years and mostly belonged to lower socioeconomic status (n=38, 76%). Most common symptom and High resolution computed tomography finding were low grade fever in 45(95%) & consolidation in 39(78%) patients, respectively. Conclusion: High resolution computed tomography scan is valuable in diagnosis of pulmonary tuberculosis & its related spectrum of diseases in patients having clinical suspicion of pulmonary tuberculosis.