The focal spot size at the anode was 1.5mm in the x-ray tube…

The focal spot size at the anode was 1.5mm in the x-ray tube used by the radiographer.  The radiographer decided to use 300mA to control motion.  The radiographer used a 45″ SID with an OID of 5 inches.  What will the unsharpness be? (round to the nearest answer)

A preliminary radiograph of the gall bladder is taken of the…

A preliminary radiograph of the gall bladder is taken of the right upper quadrant on an 10×12 inch FOV using 20 mAs and 70 kVp.  The radiologist requests a KUB on a 14×17 inch FOV because he or she thinks the patient might have an early bowel obstruction and he or she needs to see the whole abdomen.  What new mAs is required?