بنك أسئلة الأشعة التشخيصية

اقرأ أسئلة عيّنة بنك أسئلة الأشعة التشخيصية

1. 1.Not an indication for whole body scan:

   • أ.Prostatic cancer
   • ب.Colon cancer
   • ج.+Transvertical fracture of femur requiring internal fixationإجابة صحيحة
   • د.Painful wrist after fall and normal x-ray

   لماذا: The correct answer is (C) "Transvertical fracture of femur requiring internal fixation" - it is the exception or the false statement among the options. Bone scintigraphy detects increased osteoblastic turnover and is used to screen for skeletal metastases (e.g. prostate, breast, colon) and occult/stress fractures with a normal radiograph.

2. 2.Most common site of metastasis in lumbar spine is:

   • أ.Lamina
   • ب.+Pedicleإجابة صحيحة
   • ج.Spinous process
   • د.Colon cancer

   لماذا: The correct answer is (B) "Pedicle". Vertebral metastases preferentially involve the vertebral body and pedicle because of the rich red-marrow vascular supply (Batson's plexus); pedicle erosion produces the classic 'winking owl' sign.

3. 3.Radioopaque shadow on KUB is suggestive of uretral stone

   • أ.+At tip of transverse processes of L4إجابة صحيحة
   • ب.At tip of spinous processes at L3
   • ج.Lateral to sacroiliac joint
   • د.In front of symphysis pupis

   لماذا: The correct answer is (A) "At tip of transverse processes of L4". On a KUB the ureters run along the tips of the lumbar transverse processes, cross the sacroiliac joints, and enter the pelvis; calcific densities along this line suggest a ureteric calculus.

4. 4.A female with recurrent UTI & developed pyelonephritis, after 2 months of successful treatment with antibiotics, DEMSA scan was done, appropriate statement is:

   • أ.+Used to detect focal cortical defect & followإجابة صحيحة
   • ب.DTPA dynamic scan to detect scarring
   • ج.DEMSA scan with lasix is necessary in following months
   • د.Above all are true

   لماذا: The correct answer is (A) "Used to detect focal cortical defect & follow". DMSA is a static cortical renal agent that binds proximal tubular cells, making it the test of choice to detect focal cortical scarring after pyelonephritis.

5. 5.Which is not found in proximal raw of carpal bones:

   • أ.+Capitatإجابة صحيحة
   • ب.Pisiform
   • ج.Scaphoid
   • د.Lunate

   لماذا: The correct answer is (A) "Capitat" - it is the exception or the false statement among the options. The proximal carpal row is scaphoid, lunate, triquetrum and pisiform; the distal row is trapezium, trapezoid, capitate and hamate. The capitate is the largest carpal bone and the central pillar that articulates with the distal row, scaphoid, lunate and metacarpals.

6. 6.Which is wrong about meningitis?

   • أ.Complication is associated with hydrocephalus
   • ب.Predisposing factors are sinusitis and mastoiditis
   • ج.+Negative imaging rules out the diagnosisإجابة صحيحة
   • د.Pre-injury warfarin use doubles the odds of death for trauma patients with blunt head injury.

   لماذا: The correct answer is (C) "Negative imaging rules out the diagnosis" - it is the exception or the false statement among the options. Meningitis is a clinical/CSF diagnosis; imaging may be normal early, so a negative scan does not exclude it. Imaging is used to detect complications such as hydrocephalus, empyema or infarction.

7. 7.About SDH (subdural hemorrhage), one is wrong:

   • أ.Acute is hyper-dense
   • ب.+Of arterial originإجابة صحيحة
   • ج.Crescentic shape
   • د.More common than EDH (epidural hemorrhage)

   لماذا: The correct answer is (B) "Of arterial origin" - it is the exception or the false statement among the options. Subdural haematoma is venous in origin (torn bridging veins), crescent-shaped, crosses suture lines, and is more common than epidural haemorrhage; acute blood is hyperdense on CT.

8. 8.About achalasia, one is false:

   • أ.Peak bird shape
   • ب.+Fixed filling defectإجابة صحيحة
   • ج.Associated with air fluid level
   • د.Above all are true

   لماذا: The correct answer is (B) "Fixed filling defect" - it is the exception or the false statement among the options. Achalasia shows a smooth tapering 'bird-beak' narrowing of the distal oesophagus with proximal dilatation, an air-fluid level and absent primary peristalsis (tertiary/vigorous contractions in the vigorous variant); a fixed filling defect implies a tumour, not achalasia.

9. 9.About HIDA scan, one is false:

   • أ.+Non-visualization of bowel is confirmative of biliary atresia in infant with prolonged jaundice (suggest but not confirm)إجابة صحيحة
   • ب.EF of 70% exclude biliary dyskinesia
   • ج.EF of 25% is abnormal
   • د.Chronic acalculus cholecystitis can be evaluated by HIDA

   لماذا: The correct answer is (A) "Non-visualization of bowel is confirmative of biliary atresia in infant with prolonged jaundice (suggest but not confirm)" - it is the exception or the false statement among the options. HIDA (hepatobiliary scintigraphy) assesses bile flow; non-visualisation of the gallbladder suggests acute cholecystitis, while non-filling of bowel/duodenum raises biliary obstruction. A low ejection fraction (<35%) indicates biliary dyskinesia.

10. 10.Expiratory film useful in:

    • أ.Pneumothoraxإجابة صحيحة
    • ب.She is obese.
    • ج.Pleural effusion
    • د.Above all are true

    لماذا: The correct answer is (A) "Pneumothorax". An expiratory film accentuates a small pneumothorax by reducing lung volume while the pleural air stays constant, increasing its relative size and contrast.