Question 1

What patient positions may be used for a long bone measurement?
1)Standing
2)Prone
3)Supine

Accepted Answer

C

Question 2

Which long bone measurement technique requires a special single, long image receptor and uses a long SID?

Accepted Answer

Teleoroentgenography requires a special single, long image receptor and uses a long source-to-image distance (SID) to capture the entire length of a long bone in one image.

Question 3

Which of the following is currently the examination method of choice for long bone measurements because of its accuracy and reduced dose?

Accepted Answer

C

Question 4

Which long bone measurement technique requires three separate image receptors?

Accepted Answer

Scanogram is the long bone measurement technique that requires three separate image receptors. It involves taking three separate images of the limb at different angles to measure the length and alignment of the bone accurately. Orthoroentgenography, teleoroentgenography, and direct digital radiography are different imaging techniques and do not require three separate image receptors.

Question 5

What projection is used for long bone measurement radiographs?

Accepted Answer

AP (anteroposterior) projection is used for long bone measurement radiographs to measure the length of the bone from proximal to distal ends. This projection provides accurate measurements and minimizes magnification distortion of the bone.

Question 6

All of the following imaging modalities may be used to measure for limb length discrepancy except:

Accepted Answer

Nuclear medicine is not typically used for measuring limb length discrepancies as it is more suited for functional imaging rather than precise anatomical measurements.

Question 7

How many x-ray exposures are required during a long bone measurement study?

Accepted Answer

Three x-ray exposures are required during a long bone measurement study. The first exposure is taken with the limb in a neutral position, the second exposure is taken with the limb rotated externally, and the third exposure is taken with the limb rotated internally. These images are used to calculate the bone lengths and angles needed for diagnosis and treatment planning.

Question 8

Long bone measurement is most frequently used on the:

Accepted Answer

Long bone measurement is commonly used in anthropology and forensic anthropology to estimate the height of an individual. The most common bones measured are the femur (thigh bone), tibia (shin bone), and humerus (upper arm bone). These bones are all located in the lower and upper limbs, making choice C the best answer. The spine is not a long bone and therefore not typically used for height estimation. Femora only (choice D) is too specific and excludes other commonly measured bones.

Question 9

Which landmark is used to localize the shoulder joint for upper limb long bone measurement?

Accepted Answer

The superior margin of the humeral head is used as a landmark to localize the shoulder joint for upper limb long bone measurement.

Question 10

Which anatomic landmark is used to localize the knee joint for lower limb long bone measurement?

Accepted Answer

The knee joint is localized for measurement purposes just below the patellar apex, as this is where the joint space is most accurately represented.

Quiz 11: Long Bone Measurement

What patient positions may be used for a long bone measurement? 1) Standing 2) Prone 3) Supine