Thursday, 23 October 2014

One liners in Radiology

Pnemothorax is best demonstrated during expiration
Dye used in bronchography Dianosil
Solitary nodule lung lung cannot be NF
B/L calcification of lungs not found in Friendlanders pneumonia
Perihilar fluffy opacity on chest X-ray seen in pulmonary venous HTN
Rt. Lung is seen to best advantage on Rt. Anterior oblique
In Hamartoma no cavitating lesion in CXR
Best CXR are performed at 60-90 Kvp
Golden S sign seen in Rt. Upper lobe collapse
Preferred modality for Dx of pulmonary embolism is Ventilation perfusion >angiography
Well defined rounded opacity in the lung with coarse irregular calcification ---- Hamartoma
MC cause of spontaneous pneumothorax – rupture of subpleural blebs
Apex of lungs is best asses by AP view
Bulging fissure in lungs is seen in --- Klebsiella pneumonia
Tracheal bifurcation at T4-T5 level
Floating water lily sign --- Hydatid Lung
Hampton hump --- pulmonary embolism
U/L hyperlucent lung on CXR --- Poland syndrome
Mediastinal Lymph node calcification seen in Sarcoidosis
Lt. atrial enlargement(ALSO MITRAL VALVE) is seen with Barium swallow Rt. Anterior oblique view
Echocardiography can detect pericardial effusion min fluid – 15ml
Hilar dance -- ASD,VSD,TGV
Dx of acute MI hot spot seen with Tc 99
Best Dx for dissecting aorta ---- MRI
Flask shaped heart – Ebstein anomaly, TOF
Square root sign --- Constrictive pericarditis
Splenic calcification --- Brucellosis
Pancreatic scanning isotope MC used -- Selenium -75
In colitis cystic profunda whole colon can involved
No hapatomegaly in Coeliac Ds
Scalloping of the edge of sigmoid colon on barium enema seen in --- pnematosis intesinalis
Barium meal in trendelenberg position used best in Hiatal disorder
Invertogram to be done in newborn after 6 hrs
Hepatic adenoma can be Dx with high accuracy by using Nuclear imaging
Fox sign --- Acute pancreatitis
Adenolymphoma - Tc-99 scan show hot spot
Bird of prey sign ---- Sigmoid volvulus
Gold standard IOC for GIST – PETCT
Bead cystogram used in Dx of Stress incontinence
Placenta localization by Tc99
In nephrogram one see Collecting duct
Renal scan should be done in Supine postion
Rim sign – Massive hydronephrosis
Neonate has mass in kidney which on USG is seen as hypoechoic shadow ---- Mesonephroblastic tumour
Uereterocoele (IVP) --- Adder head appearance
Central stellate scar on CT --- renal oncocytoma
A tumour Trouser leg appearance on an ascending myelogram –intramedullary
Stipple sign in transitional CC of the renal collecting system best seen in retrograde pyeloureterography
Basal ganlia calcification seen in Wilson ds
MC intracranial calcification is peneal calcification
Tram-line calcification --- Sturge weber syndrome
Commonest cause of intracerebral calcified shadow --- Oligodendroglioma
Most serious complication of myelogram – Allergey
Calcification in basal ganglia --- hypothyroidism, hypoparathyroidism
In fluorescein angiography dye is injected in ante cubital vein
Bracket calcification in skull X-ray – copus callosum lipoma
Periventricular calcification --- CMV
In meningioma no erosion occur
Extramedullary intradural tumour – Neurofibroma
Multiple sclerosis lesion in white matter
Banana sign --- Spina bifida
X-ray of Skull n phalanges is diagnostic in hyperparathyroidism
Dead bone on X-ray look more radio opaque
Intraosseous skeletal tumour is best Dx by CT scan
Stryker’s view is used in shoulder joint to visualize --- Recurrent subluxation
Normal metacarpal index is 5.4 – 7.9
Stenver View(Towne view) --- internal auditory meatus ,mastoid air cell(MALIS see mnemonics page)
Champagne Glass pelvis --- Achondroplasia
Umbau Zones -- osteogenesis imperfect
Caldwell view – Superior orbital fissure
H – shaped vertebra --- Sickle cell anemia
Schober ‘s sign --- Flexion of lumber spine
Vertebra plana --- EG,Malignancy
5 –FU not given in Mycosis fungoides
Karnofsky scale --- measurement of size of tumour
Sunburst calcification on X-ray -- insulinoma
Calcific hepatic metastases --- Adenocarcinoma of colon
S/E of USG in small organism --- cavitation
Isotope selectively concentrated in abscess --- Gallium
X-Ray film are least sensitive to which coloured light – red
Photoelectric interaction Primarily in K shell
Thesaurosis -- Resins in hairspray
Grid – used for reducing scattered radiation
Best Dx of nasopharyngeal angiofibroma – CECT
Medusa head in X-Ray – ascariasis
Spring water cyst – pleura pericardial cyst
USG of umbilical artery done for to know heart beat
USG frequency used in obs is 1-20 MHz
Sestamibi Scan --- parathyroid adenoma
UV A – 320-400 nm
Active ingredient in Xray film – silver bromide
“Time of Flight “ technique used in MRI
Target angle in tele therapy --- 300
T ½ of Co60 = 5.2 yrs
Radioactive gold is used in malignant ascitis
Radioactive phosphorus used in polycythemia
Isotope which replacing radium – Cs
Tc99 T ½ = 6hrs
Latest source of neutrons for radiotherapy --- Californium -256
A single whole body dose can cause death – 300 rad
In teletherapy distance is 100 cm
1st sign after Radiation is Erythema
T ½ of Rn-222 =3-6 days
1 gray(unit for absorbed)= 100 gray
Benign condition treated by radiotherapy is pituitary adenoma
Dose for total body irradiation in bone marrow transplantation – 1000 cgy – 1200 cgy
Hyperfractionation Rx (Radiotherapy) used in Lung cancer
Naturally occurring radioactive substance in the body – K40
Radioactive isotope used in gamma knife for t/t of AV malformation—Co
Not used in brachytherapy – I131
RAIU – I 123 (AI 07)
Max permissible dose of radiation for radiation worker 50 MSV per year
1Curie = 3.7 Gbq
Point B t/t of Ca of cervix by radiotherapy --- Obturator node
Commonly used in intra operative Rx – Electron

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