A large majority of women who develop breast cancer have no known risk factors.

EXTRA CREDIT FROM THE STANTON AND STINSON HOMEWORK: If a patient is treated with a four-field box for a daily fractional dose of 180 cGy. What is the dose delivered through the AP/PA if each field is weighted 1:1:1.2:1.2 for the AP, PA, right lateral, left lateral respectively? _______ .

A patient is prescribed to have two 15 x 15 cm treatment portals, which are equally weighted, parallel opposed lateral fields, treated to a dose of 350 cGy, using the source to axial technique and an 18 MV beam.  The patient’s separations are 42 cm. The linear accelerator has a reference output of 1.132 cGy/minute in air at isocenter. The collimator scatter factor is 1.036. The fields have a tissue air ratio of 0.752 and tissue maximum ratio of 0.685.  Each beam will have a 45-degree wedge with a wedge transmission factor of 65.6%. Calculate the MU for one of the beams.

EXTRA CREDIT FROM THE STANTON AND STINSON HOMEWORK: Given a magnification factor of 1.28 and a physical measurement of 18 cm x 13 cm on the patient, what should the X field measure on the portal film/image? _______ .

In the Stanford technique, the patient is treated with six portals that are positioned

What is the volume in the cylinder

In smooth muscle cells, membrane depolarization __________ necessary and sarcoplasmic reticulum calcium release ________ required to elicit contraction.

Find the area of the shaded region. y = x2 – 4x + 3

The term image registration applies to the process of  

Which of the following molecules is ribose?