CaMrT study set Questions with solutions 2024

CaMrT study set Questions with solutions 2024 Small pneumothorax: what additional image to the routine pictures? PA inspiration, PA expiration, Lateral (or lateral decub with affected lung UP) AEC not recommeneded - for expiration should be increased by 1/3 of that used for inspiration images Pneumothorax picture in PA inspo: what additional image to the routine pictures? PA Expiration.... or lateral decub with affected lung up (air rising to the highest point in the hemithorax is more clearly visible then on erect views) Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:05 / 0:15 Full screen Shoulder AEC hard soft tissue differentiation - what factors to adjust? WINDOW WIDTH (narrower) smaller ww to enhance the amount of blacks and whites showing up so you can see the small differences in similar HU What is the best position + SID for highest spatial resolution for C-spine obliques? RAO PA (reduce dose) (LAO RAO), long SID (180cm) Trauma: AP Caldwell with IOML perpendicular, how much angulation? 8 cephalic (to compensate for the OML) What is seen on CT of an intracranial SOL? Midline shift OR ventricle compression SOL = space occupying lesion Pregnant worker already with 1mSv irradiated, how much for the remainder of the pregnancy? (declared at 3 months?) 4msv total 3msv for remainder of pregnancy Projection for orbits: (AP 15 Axial, PA 15 Axial, PA 30 Axial, AP 30 Axial) Modified waters (modified parietoacanthial projection) best projection TMJ image - angulation? Axiolateral projection (Schuller method): 25-30 caudad - center 1.3cm anterior and 5cm superior to upside EAM Axiolateral oblique projection (Modified law method): 15 degree caudal angle - center 1.5inch superior to upside EAM AP axial projection (modified towne): angle 35-degrees caudad from OML OR 42-degrees from IOML - center 3inches superior to nasion. Mandible image - how much was it turned (body is well demonstrated?) 30 toward IR (45 degree rotation demonstrates mentum, 10-15 degree rotation provides a general survey of the mandible, true lateral demonstrates the ramus) Pelvis ischial spine not superimposed over the pelvic rim - closer to acetabulum - which way is it rotated? LPO or RPO If the left ischial spine is demonstrated w/o pelvic brim superimposition then it is superimposed on the right acetabulum. left obturator foramen more foreshortened than right. In pelvis rotation, the upside will have ischial spine superimposition over the acetabulum. Maxillary sinus opacified, what pathology is most likely? Blowout fracture- pretty freaking sure "opacification of the sinus caused by hemorrhage and mucosal edema is an indirect sign of..this" OR sinusitis Increase HVL = tungsten vaporization? come back to this one. HVL is the thickness of a designated absorber required to decrease the intensity of the primary beam by half its original value. an xray beam of 3-4.5mm aluminium is considered acceptable when kVp ranges from 80-100. Increased skin dose, inadequate filtration to reduce the beam to half, leakage radiation Optimal image of pelvis - 75-85 kVp, outer cells, grid, Pelvis taken at 12mAs, 80 kVP, how to decrease patient dose? 15% rule therefore 92 kVp and 6 mAs When you increase kvp by 15% you have to reduce mAs in half to compensate Nurse standing at 1m, how much further should she stand to decrease dose by 4x? 2m Port-a cath image- (refrenace kmart) hiatal hernia image Pericardia effusion/lung abscess image osgood schlatter image of the knee lateral ankle- overroated image open mouth rotation image - depress chin and rotate to the right Which device causes pulmonary infarction? A swan ganz catheter IMAGE rotated L-spine : rotate to the left to correct ((pp- pedicle posterior on body means overroated)) Supine KUB image with symphysis cut off- how to adjust fix with bladder shot: center to bladder, cone down, and perpendicular beam Bladder shot angle that results in least distortion and brings symphysis down? 10 caudad Trauma patient with CPR and suspected c-spine fracture - how to ensure airway? Thrust jaw forward- used to improve airway patency. CT image of intracranial hemorrhage - kmart reference HU of increase density of subdural hematoma? 50-60HU Repeat rate - acceptable? 5% SC35 Xray for post lung CT biopsy - what views? PA inspiration and expiration (incase there is a present pneumothorax) Pixelated 3D rendering CT image - how to improve? Use THINNER slice thickness