To compensate for the normal degree of kyphosis of the sacrum in the anteroposterior projection, the central ray should be directed 

Which type of imaging procedure or study requires the patient to sign an informed consent?

Which of the following pathologic conditions will require an increase of 30% of the usual mAs in order to obtain the appropriate radiographic density?

A new linear focused grid has been installed in the table bucky of a radiographic unit.  The first test image taken shows a considerable loss of radiographic density on the left and right sides of the image.  The most likely cause of this is an

The posteroanterior axial (Caldwell) method for the paranasal sinuses is used primarily to demonstrate the:             1.  Frontal Sinuses             2.  Anterior Ethmoid Sinuses             3.  Maxillary Sinuses

Which of the following is used in digital fluoroscopy, replacing the image intensifier’s Television camera tube?

Factors that can affect histogram appearance include:           1.  beam restriction          2.  centering errors          3.  incorrect SID        

This radiographic examination shown below in Image C, of the urinary system with use of contrast media is termed a/an:  (IMAGE C)  

An abdominal radiograph is taken of a patient measuring 19 cm.  If all the same conditions are maintained and a second image is taken on a different patient measuring 29 cm, the second image will most likely have a/an:          1.  Decreased radiographic density ( decreased receptor exposure)          2.  Increased image contrast          3.  Decreased amount of secondary scatter

Scatter radiation is created whenever a high-energy photon interacts with the: