Chest radiograph is an easily available non invasive tool in evaluation of health. The cardiothoracic ratio (CTR) is commonly used as an indicator of cardiomegaly in clinical radiology. It can promptly diagnose congestive cardiomegaly apart from other lung and pleural pathologies and also depicts repsonse to treatment given, like diuretics in heart failure. Although there are better modalities available like echocardiography, computed tomography and magentic resonance imaging, chest radiography and cardiothoracic ratio are still being used by clinicians, especially in emergency department, intensive care unit and for frequent follow ups . CTR is calculated by dividing the cardiac diameter (CD) by the thoracic diameter (TD) as measured on posteroanterior chest radiography (chest PA). CTR of >0.5 is abnormal on an inspiratory breath-hold chest radiograph. The purpose of this study was to compare the statistical correlation of CTR between chest radiograph with CT and to present real Heart Size (HS), Thoracic Size (TS), and Cardiothoracic Ratio (CTR) on chest PA and chest AP in the DR system and in computed tomography (CT). The conclusion of the study is that the measurement of CTR from radiograph & computed tomography (CT) from both axial & coronal reformations were concordant with another

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Background Renal calculi remain a major economic and health burden worldwide and are considered a systemic disorder associated with multiple other diseases. Several studies have observed that patients with idiopathic calcium renal stones show a reduction in bone mass. This study aimed to evaluate bone mass reduction on a non-contrast CT scan study in a group of idiopathic calcium-containing renal calculus disease patients in comparison with subjects without renal calculus disease. Methodology This non-interventional, cross-sectional study included a total of 300 patients with 150 cases (with renal calculi) and 150 controls (without renal calculi). Patients were divided according to age groups of 18-40, 40-60, and more than 60 years. The renal calculus size and the mean iliac bone thickness were calculated, and Spearman’s correlation test was used to determine the correlation between them. Results The mean iliac bone thickness was significantly lower in the cases (3.29 mm) compared to the controls (9.73 mm with a standard deviation of 1.341 mm). There was a statistically significant negative correlation between the size of the renal calculus and the mean iliac bone thickness. Conclusions Renal calculus disease associated with hypercalciuria caused by increased bone resorption is reflected by the decreased iliac bone thickness on CT scans. Our study used the iliac bone (cancellous bone) in predicting bone mass reduction which shows changes early in the course of the disease compared to the neck of the femur and lumbar vertebrae (compact bones). It helps in predicting osteoporosis early and prevents the progression of the disease through early and appropriate clinical and urological intervention.