INVESTIGATION OF CHOICE (IOC)
1) Acoustic neuroma-----------gadolinium DTPA enhanced MRI
2) Nasopharyngeal angiofibroma----------CECT scan
3) posterior fossa tumours------------MRI
4) DVT-----------venous USG
5) pulmonary embolism-----------CT chest with contrast
6) imaging of seminal vesicle and ejaculatory ducts---vasography >transrectal USG
7) extraintestinal amoebiasis-------ELISA
8) avascular necrosis--------------MRI
9) interstitial lung disease------HRCT scan
10) bronchiectasis------------HRCT scan
11) osteoporosis---------DEXA scan
(dual energy x-ray absorptiometry)
12) acute ureteric colic--------non contrast spiral CT scan abdomen
13) renal TB
early stage-----IVP
late stage------CTscan
14) localization of pheochromocytoma------MRI
15) acute dissection of aorta-----transoesophageal ECHO
16) chronic dissection of aorta(in stable patients)-----MRI
17) congenital hypertrophic pyloric stenosis------USG
18) extrahepatic biliary atresia-------peroperative cholangiogram
19) discrete swelling(solitary nodule) of thyroid-----FNAC
20) acute Subarachnoid haemorrhage(SAH)-----noncontrast CT HEAD
21) to localise site of bleed in SAH-----------4 vessel X-ray angiography
22) Single Bone Metastasis-------- CT
23) Multiple Bone Metastasis------- Bone scan
24) Spine Metastasis --------- MRI
25) Avascular necrosis-------- MRI
26) Bone Density/Osteoporosis-------- DEXA (Dual energy x ray absorptiometry)
27) Aneurysm/ AV Fistula-------Angiography
28) Dissecting Aneurysm (Stable)-------- MRI
(Unstable)-------------Trans oesophageal USG
29) Pericardial Effusion--------- Echocardiography
30) Lobulated pericardial effusion------- MRI > CT
31) Minimum Pericardial Effusion------- Echocardiography
32) Ventricular Function-------- Echocardiography
33) Radiotherapy/ Chemotherapy induced cardiotoxicity------ Endomyocardial Biopsy
34) Pulmonary Embolism------- CECT> Pulmonary Angiography >V/Q Scan
35) Interstitial lung disease (Sarcoidosis)------ HRCT
36) Bronchiectasis-------- HRCT scan
37) Solitary Pulmonary Nodule------- High resolution CT (HRCT)
38) Posterior Mediastinal Tumor------- MRI
39) Pancoast Tumor (Superior Sulcus Tumor) ------ MRI
40) Minimum Ascites/ Pericardial effusion/Pleural effusion ------- USG
41) Traumatic Paraplegia------- MRI
42) Posterior Cranial Fossa ------- MRI
43) Acute Haemorrhage------- CT
44) Chronic Haemorrhage------- MRI
45) Intracranial Space Occupying Lesion------- MRI
46) Primary brain tumour------ contrast MRI
(Gold standard however remains to be biopsy)
47) Metastatic brain tumor------- (Gadolinium) contrast enhanced MRI
48) Temporal Bone---------CT
49) SAH Diagnosis-------- unenhanced CT
50) SAH aetiology------- 4 vessel MR Angiography > CT>Angiography > DSA
51) Obstetrics------- USG
52) Calcifications-------CT
53) Blunt abdominal Trauma------- CT
54) Acute Pancreatitis------ CT
55) GERD------ pH manometer > endoscopy
56) Dysphagia-------- Endoscopy
57) Congenital hypertrophic pyloric stenosis----- USG
58) Obstructive Jaundice/GB Stones------ USG
Ureteric stone------- non contrast CT
59) Diverticulosis ------- barium enema
60) Diverticulitis ------- CT scan
61) Renal TB (early) ---- IVP
(Late)------ CT
62) Posterior Urethral Valve----------- MCU
63) Renal Artery Stenosis-------- Percutaneous Angiography
64) Extraintestinal Amoebiasis--------- ELISA
65) Discrete swelling(solitary nodule) of thyroid-------- FNAC
