Dr. Dheeraj Kumar

radiology medical imaging radiography ultrasound mediacl imaging interventional radiology computed tomography treatment planning radiotherapy ct mri radiation protection ct scan contrast media anatomy transducer mri clinical applications gradient coil rf coil seldinger technique principle of ultrasound physical principle film processing mri principle spect pet tomography chemical solution fixer developer radiography film development electron build-up range of secondary electrons let transmission of x-ray linear energy transfer their production x-rays family population of india nuclear medicine atomic structure radiation and spectra quality assurance x-ray system guidelines for x-ray equip. mri coils mri safety radiolpg micturating cystourethrogram usg radilograhy radiographic modalities latent image x-ray special proceduer retrograde urethrography advancement in ct scan grid radiographic grid uses of intensifying screen intensifying screen anatomy is the study of the st emergency in radiology gynecology x-ray interaction with matter mri procedures dsa cta mra angiography clinical applications special procedure general anatatomy guidewire catheter roentgen mas kvp radiographic exposure ptc oral cholecystography(ocg) bones muscles types of contrast media radiotherapy contrast media role of contrast media in rt ir procedure interventional procedure rt planning procedure medical specialty introduction of ir definition aliasing artifact range ambiguity speed error side lobes/grating lobes refraction mirror image reverberation acoustic enhancement acoustic shadowing analysis software type analysis types of research write research papers reasearch methodology git clinical significance gallbladder pancreas liver large intestine small intestine stomach esophagus oral cavity anatomy of digestive system digestive system git body mechanics connective tissues joints health and rehabilitation health program social changes and devience social changes and stress human adaptation social change factors of social changes meaning of social change social change and filtration filters half-value thickness quality specification units of radiation measurement collimator beam modifying devices x-ray beam restrictor and hetrogenous homogeneous impact on scatter x-ray special procedure ultrasound image artifacts susceptibility artifacts truncation artifacts gibbs (ringing) artifacts ghost artifacts aliasing artifacts chemical shift artifacts zebra artifacts zipper artifacts motion artifacts dose calibration radiation dose measurement radiation penumbra isodose curves scatter air ratio tissue maximum ratio tissue air-ratio peak scatter factor percentage depth dose bragg-peak