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BASIC PRINCIPLES OF CT

In a survey conducted in U.S.A 75% of Clinicians voted CT & MRI as the MOST EVENTFUL USEFUL INVENTION which has contributed to the Diagnosis, Management and Better Health in the 20 th century. BASIC PRINCIPLES OF CT.

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BASIC PRINCIPLES OF CT

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  1. In a survey conducted in U.S.A 75% of Clinicians voted CT & MRI as the MOST EVENTFUL USEFUL INVENTION which has contributed to the Diagnosis, Management and Better Health in the 20th century

  2. BASIC PRINCIPLES OF CT • A CT MACHINE HAS A X-RAY TUBE AND A SET OF DETECTORS OPPOSITE TO IT MOUNTED ON A RING LIKE FRAME . • DURING SCAN THE TUBE AND DETECTORS STARTS ROTATING ARROUND THE PATIENT . • THE X-RAYS COMING OUT OF THE PATIENT FALLS ON THE DETECTOR WHICH SENDS ELECTRIC SIGNALS TO A COMPUTER. • THE COMPUTER USES THESE SIGNALS TO RECONSTRUCT AN IMAGE.

  3. HOUNSFIELD UNIT( CT NO.) +1000 +100-200 +50-60 +30-40 +20 0 -10 - -100 -200 - -1000 BONE CALCIFICATION FRESH BLEED SOLID (PARENCHYMA) FLUID WATER FAT AIR

  4. ADVANCES IN CT • SPIRAL CT • THE PATIENT MOVES IN SUCH A SPEED THAT DURING ONE REVOLUTION OF THE TUBE THE PATIENT IS MOVED BYA DISTANCE EQUAL TO THE SLICE THICKNESS,A COMPLETE VOLUME OF TISSUE IS EXAMINED,HENCE THE TERM” SPIRAL VOLUMETRIC CT”. • EBT(ULTRA FAST CT) • HERE INSTEAD OF X-RAY TUBE AN ELECTRON BEAM ROTATES ARROUND A CIRCULAR ANODE WHICH EMITS X-RAYS AS A RESULT OF BOMBARDMENT OF THE ELECTRONS. • AN ELECTRON BEAM CAN BE MOVED FASTER THAN X-RAY TUBE ARROUND THE PATIENT RESULTING ULTR FAST SCANS. IT COULD BE ARGUED THAT MRI HAS PROVIDED STIMULUS FOR FURTHER ADVANCES IN CT.

  5. MULTISLICE CT • THE ADVANTAGES OF THIS NEW TECHNIQUE INCLUDE, • THE EXTENSION OF THE SCAN AREA WITHOUT ANY DRAWBACKS IN TERMS OF IMAGE QUALITY AND SCAN DURATION. • A SIGNIFIACANT REDUCTION OF COMMON IMAGE ARTIFACTS. • EXCELLENT QUALITY OF 2D AND 3D RECONSTRUCTIONS . • THESE FEATURES MAKES MSCT IDEAL TOOL FOR , • CEREBRAL PERFUSION STUDIES • CT ANGIOGRAPHY • BRAIN STEM AND POSTERIOR FOSSA ASSESSMENT • SKULLBASE AND SPINAL IMAGING.

  6. NORMAL ANATOMY OF BRAIN

  7. INTRA PARENCHYMAL HEMORRHAGE EXTRA DURAL HEMORRHAGE

  8. FRACTURE

  9. INTRA PARENCHYMAL HEMORRHAGE

  10. INTRA VENTRICULAR HEMORRHAGE SUBDURAL HEMORRHAGE

  11. SUBDURAL HYGROMA SUB ARCHNOID HEMORRHAGE

  12. MCA ANEURYSM ACUTE INFARCT

  13. ARTERIOVENOUS MALFORMATION

  14. ACOUSTIC SCHWANNOMA PLAIN STUDY CONTRAST STUDY

  15. PARA SELLAR MENINGIOMA PLAIN STUDY CONTRAST STUDY

  16. PARA SAGITTAL MENINGIOMA

  17. PITUITARY MACRO ADENOMA

  18. CAVERNOUS ANGIOMA PLAIN STUDY CONTRAST STUDY

  19. P N E T PLAIN STUDY CONTRAST STUDY

  20. OLIGODENDRO GLIOMA

  21. CEREBRAL ABSCESS CONTRAST STUDY PLAIN STUDY

  22. OSTEOMEATAL COMPLEX

  23. BRONCHOGENIC Ca CONTRAST STUDY

  24. H R C T-LUNG CONSOLIDATION H R C T LUNG WINDOW NORMAL LUNG WINDOW

  25. KARTAGENER’S SYNDROME LUNG WINDOW TOPOGRAM

  26. AORTIC ANEURYSM THORACIC-PLAIN ABDOMINAL-CONTRAST THORACIC-CONTRAST CORONAL RECONSTRUCTION

  27. R C C PLAIN STUDY CONTRAST STUDY

  28. EMPHYSEMATOUS PYELONEPHRITIS PLAIN CONTRAST

  29. A D P K

  30. TRICHOBEZOAR CONTRAST PLAIN

  31. BUDD- CHIARI SYNDROME

  32. LIVER METASTASIS CONTRAST STUDY

  33. MEGA COLON TOPGRAM

  34. ADVANTAGES OVER MRI • COST EFFECTIVE COMPARED TO MRI • IN TRAUMA AND ANY ACUTE EMERGENCY SITUATION CT IS THE PREFFERED MODE OF IMAGING. • NO CLAUSTROPHOBIA • REQUIRES LESS TIME THAN MRI SO IMMEDIATE AND FAST INFORMATION. • FOR BONE,LUNG & ABDOMEN USEFUL THAN MRI. • CT GUIDED PROCEDURES. • OPTIONS OF VIRTUAL ENDOSCOPY ,3D RECONSTRUCTION ETC.

  35. We at Balmatta Diagnostic & Research Centre Ltd are committed to Excellence in Diagnosis,Human relationship and good Rapport with Clinicians. • We Provide Complete Imaging Under ONE ROOF • FUTURE IS AT

  36. THANK YOU

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