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
ACUTE SAH < 48 Hrs - NON CONTRAST CT
CHRONIC SAH >48Hrs - MRI
DENSITY OF HEMORRHAGE DECREASES WITH TIME AND GRADUALLY APPROACHES THAT OF CSF
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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