Biomedical Engineering Reference
In-Depth Information
scan performed on a 72-year-old woman for investigation of unknown primary
malignancy, and the combined PET/CT revealed a primary pancreatic cancer.
Although the PET/CT imaging is still in its infancy and a number of technical
problems remain to be solved, it is anticipated that the combination has the
potential to solve many of the present diagnostic challenges associated with
whole-body oncologic imaging and has an important role in surgical planning,
radiation therapy, treatment monitoring, and diagnosis of disease.
Acknowledgment
This work was supported by the Hong Kong Polytechnic University under Grant
G-YX13.
Questions
1.
Medical imaging modalities can be broadly classified into structural and
functional. Briefly account for their meanings and give some examples
for each case.
2.
What are the major differences in the reconstructed images of emission
computed tomography and X-ray CT?
3.
PET and SPECT are collectively known as emission computed tomogra-
phy. Briefly describe some of the major differences between them in terms
of physics and instrumentation.
4.
List the various events and their meanings in PET detection.
5.
List some of the current applications of PET in clinical oncology.
6.
Photon attenuation effect is common to both PET and SPECT imaging.
Why is it so important to correct for this effect?
7.
Briefly describe the main difference in correction of photon attenuation
in PET and SPECT.
8.
Attenuation correction in PET is usually performed using a transmission
scan. What are the major drawbacks of this approach?