Oncology Imaging Flashcards
What is the most valuable initial imaging technique of bone lesions?
XRAY, looks at the nature of the bone matrix and at the interface of lesion and bone.
Describe how each of the following bone lesions appear on XRAY:
- active lesions
- latent lesions
- aggressive lesions
Active: easily discernable transition without reactive rim
Latent Lesions: surrounded by reactive cortical rim
Aggressive Lesions: broad infiltrating border.
Pancoast Tumor:
- location
- involves what nerves?
found in the apices of the lungs; involving C8, T1, T2 nerves
What type of imaging are Virtual colonscopies?
What type of imaging is mammography?
usually done with CT, can be done with MRI as well.
Mammography is XRAY , normal breast has masses, is not homogenous
Abnormal Mammogram:
- are most abnormalities CA?
- what test may show more definition?
- what is done to confirm abnormal tissue
NO, most abnormalities are NOT cancer.
CT and MRI
Biopsy is done to confirm abnormal tissue
Nuclear Scans:
- how does this work?
- types
- measures what?
How: radio-isotope injected IV & 3 hrs later pt is scanned with gamma camera
Types:
- PET
- SPECT
- CT/MRI
Measures bone metabolism or remodeling
Bone Scans:
- what type of imagining?
- what does this show?
- downfall of this test
May be CT or MRI
Show increased metabolic activity or increased blood flow
Downfall: sensitive test that can overestimate lesions
PET Scan
- what does PET stand for?
- what is tracer used?
- what other imaging is used in combo to get 3D image
- especially useful in what cancers?
Positron Emission Tomography
Fludeoxyglucose (FDG)
CT and MRI
especially useful in lymphomas and lung CA
SPECT
- what does SPECT stand for?
- MOA
- especially useful in what cancers?
Single Photon Emission Computer-Assisted Tomography
MOA: inject radioisotope that is measures by nuclear camera combined with CT.
especially useful in osteoid osteoma and osteoblastoma.
What of MRI is best for detecting tumors?
Which imaging is the modality of choice for thyroid tumors/lesions?
FNA bx are guided by what imaging?
T/F, unilateral destruction of vertebral pedical by CA mets is known as winking owl sign?
T2 scan
Ultrasound
US,CT, fluoroscopy
True.
what imaging is used to assess response to CA tx?
What is the best predictor of survival after cancer Tx
bone scan, CT, and PET
PET scans are best predictor of survival after CA tx.
Review slides 88 and 89 for take home messages.
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