Hip Phantom
Author: Oliver Watzke, IMP Erlangen

oliver@imp.uni-erlangen.de

1. Aims
An anthropomorphic hip phantom is used to examine artifacts that occur in the hip region, especially those resulting from metallic implants. A low contrast object in the bladder region serves to judge the detectability of cancers in this region.

2. Phantom Description
The phantom has been designed to display the most important structures in the hip region with a minimal number of simple geometrical objects.
The Phantom has a height of 15 cm and a cross section of 35 X 15 cm. The legs are cylinders that meet an oval rump. The femurs are also cylinders, filled with bone marrow. While the pelvis bone is (for the sake of simplicity) realized as an ellipsoid filled with bone marrow, both top of the femur and femur head are solid spheres. In the upper region of the phantom a small semi-ellipsoid represents the coccyx.
Between the pelvis bones a urine filled spherical bladder is situated, with a spherical low contrast object (representing a cancer) in the region of the bladder wall.
The HU values are as follows:

Analogous phantoms have been designed with one and two metallic femur implants made of titanium or steel.

3. Images
Fig. 1a, b, c. Horizontal sections of the hip phantom at z positions 1, 9 and 11 cm
a)

wpeA0.jpg (5350 Byte)

b)

wpe9F.jpg (6867 Byte)

c)

wpe9E.jpg (6019 Byte)

Fig. 2. Vertical section of the hip phantom at y = 0.

wpe9D.jpg (6749 Byte)

Fig. 3: Vertical section of the hip phantom with metallic prosthesis at y = 0.

wpe9C.jpg (6301 Byte)

Fig. 4: Horizontal section of the hip phantom with metallic prosthesis at z = 6 cm. The implant has an elliptical cross section.

wpe9B.jpg (5738 Byte)

 

View Phantom Definition
phantom syntax explanation

Other Phantoms
Abdomen Head Hip Jaw
Lung Thorax High Contrast Low Contrast