At what frequency must the radiographic equipment be checked for linearity and reproducibility?

Structure number 3 in the below figure is best demonstrated in which of the following positions?

The ethical principle that aspires to, above all, do no harm describes

Esophageal varices are best demonstrated in which of the following positions

Which of the following is/are characteristic(s) of anemia?1.    Decreased number of circulating red blood cells2.    Decreased hemoglobin3.    Hematuria  

Which of the following radiographic examinations require(s) the patient to be NPO 8-10 h prior to examination for proper patient preparation1.    Abdominal surgery2.    Upper GI series3.    BE

The effective energy of an x-ray beam is increased by increasing the1.    Added filtration2.    Kilovoltage3.    Milliamperage

The structure indicated by the number 1 in the image above is the

Which of the following is/are valid evaluation criterion/criteria for a lateral projection of the forearm?1.    The radius and the ulna should be superimposed distally2.    The coronoid process and the radial head should be partially superimposed3.    The humeral epicondyles should be superimposed  

The vessels seen as numbers 1 and 2 in the image below function to convey