Oral exam Flashcards
US propagates in the soft tissue at what speed
1540 m/s
Convex probe=
3.5-5 MHz
Example for anechoic structures
Blood
CSF
Urine
Cyst
How will you describe Hemangioma on US
Hyperechoic
Simples US mode
When is it used
A
Opthalmology
M mode is for
Motion
Position change over time
Different Doppler modes
Color
Contineous
Pulse
Power
Microrbubbles are eliminated through the
Lungs
on sonoelastography, stiffer structures are what color?
Blue
Types of elastography
Static
Dynamic
US guided procedures
FNA of the thyroid……
Gallstone on US
Anechoic bcs it it a cystic structure
Define an isotope?
Same atomin number
Different mass number
NM can be devided into
Conventional NM= SPECT, Tc99m
Diagnosis NM= PET, F18-FDG
Tc99 is absorbed where
in the bone in proportion to osteoblast activity
Types of CT image
Sequential
Helical
HU of different tissues
Air: -1000 Lung: -600 Fat: -60 Water: 0 Soft tissue: +60 Bone: +1000
Fresh hematoma on CT is always
Hyperdense
What is bad about Iodine contrast material?
Can lead to acute renal failure
What is not a contraindication regarding iodine material
Allergy for the iodine antiseptic agent
What is the action of Gadolinium?
Lower the T1 relaxation time
Bad effect of Gadolinium
Nephrogenic systemic fibrosis may occure even after couple of months
Non malignant tumor of the liver
Cavernous Hemangioma
Cavernous Hemangioma=
Large collections of vascular channels containing slow moving blood
Cavernous Hemangioma on US
Hyperechoic with post. acoustic enhancement
Mediastinum contains
Heart
Main vessels
Trachea
Bronchi
Mediastinum is devided into
Ant
Mid
Post
3 main mediastinal pathologies
Pneumomediastinum
Mediastinitis
Mediastinal masses
When describing a fructure
Number of fructure segments
Direction of the fructure line
Relationship btw fragments
Closed/open
Fructure in children are classified by
Salter Harris classification
DD of acute abdomen
Abdominal aorta rupture Acute pancreatitis Bowel ischemia Perforated peptic ulcer Perforated diverticulitis
Imaging methods of acute abdomen
US
CT
Abdominal radiograph
Fluoroscopy
MRI
Gold standard for kidney stones
Low dose CT
Most common primary bone neoplasm in adults
Multiple Myeloma
Types of bone metastasis
Osteolytic
Sclerotic
Mixed
Osteomyelitis is diagnosed with what modality
MRI
IBD (2)
Crohn’s
Ulcerative colitis
Radiology method in case of prostate
T2W MRI
Hypointense lesion