CT Registry Review System Operation & Components

Question 0

X-RAYS ARE DIRECTED INTO A LOCALIZED SECTION OF THE PATIENT.

Answer 0

TRUE

Question 1

WHAT IS CT?

Answer 1

A DIAGNOSTIC IMAGING MODALITY WHICH USES X-RAYS TO IMAGE INDIVIDUALS CROSS-SECTIONAL SLICES THROUGH THE BODY

Question 2

X-RAYS THAT COMPLETELY PENETRATE THE PATIENT ARE DETECTED

Answer 2

TRUE

Question 3

THE DETECTED SIGNALS ARE CONSTRUCTED INTO AN IMAGE

Answer 3

TRUE

Question 4

DAC STANDS FOR?

Answer 4

DIGITAL TO ANALOG CONVERTER

Question 5

THE SCAN CONTROLLER IS RESPONSIBLE FOR?

Answer 5

TIMING AND OPERATION OF PATIENT TABLE, GANTRY AND HIGH VOLTAGE GENERATOR

Question 6

THE SIGNALS SENT TO THESE COMPONENTS MUST BE CONVERTED INTO________.

Answer 6

AN ANALOG OR CONTINUOUS WAVEFORM

Question 7

THE HIGH VOLTAGE GENERATOR IS NECESSARY TO PRODUCE THE HIGH VOLTAGE POTENTIAL THAT EXISTS BETWEEN THE____ AND ____ OF THE CT TUBE

Answer 7

CATHODE / ANODE

Question 8

THE X-RAYS THAT PASS THROUGH THE PATIENT’S BODY ARE MEASURED BY?

Answer 8

DETECTOR ELEMENTS ATTACHED TO THE GANTRY OPPOSITE OF THE TUBE

Question 9

THE TINY ELECTRICAL SIGNALS MUST PASS THROUGH WHAT TO INCREASE OR AMPLIFY THEIR STRENGTH?

Answer 9

AN AMPLIFIER

Question 10

WHAT DOES S/H STAND FOR?

Answer 10

SAMPLE AND HOLD COMPONENT

Question 11

THE AMPLIFIED SIGNALS ARE WHAT TYPE OF SIGNALS?

Answer 11

ANALOG

Question 12

THE FIRST CT SYSTEM WAS COMMERCIALLY INTRODUCED IN WHAT YEAR?

Answer 12

1973

Question 13

1ST GENERATION SCANNERS GENERATED A THIN, FOCUSED X-RAY BEAM CALLED A _______ THROUGH THE PATIENT TO A SINGLE DETECTOR.

Answer 13

“PENCIL BEAM”

Question 14

SINCE THE SCAN TIMES WERE SO LONG IN 1ST GENERATION SCANNERS, THEY WERE ONLY USED TO SCAN _______

Answer 14

HEADS

Question 15

HOW MANY DETECTORS DID A 1ST GENERATION SCANNER HAVE?

Answer 15

1

Question 16

THE TUBE/DETECTOR ASSEMBLY MOVED ACROSS THE PATIENT THE ROTATED BY_____?

Answer 16

1 DEGREE

Question 17

IT TOOK APPROXIMATELY ___ MINUTES TO COMPLETE A SCAN WITH A 1ST GENERATION SCANNER.

Answer 17

5

Question 18

2ND GENERATION SCANNERS INCORPORATED AN X-RAY TUBE WITH GENERATED AN X-RAY BEAM THAT HAD A SHAPE LIKE?

Answer 18

AN OPENED PAPER FAN

REFERRED TO AS HAVING A “FAN BEAM GEOMETRY”

Question 19

2ND GENERATION SCANNER COLLECTED DATA ____ TIMES FASTER THEN 1ST GENERATION SCANNER

Answer 19

10

Question 20

THERE WERE APPROXIMATELY ____ DETECTORS ON 2ND GENERATION SCANNER COLLECTING DATA AND TOOK ABOUT ___ SECONDS PER IMAGE

Answer 20

30/20

Question 21

2ND GENERATIONS SCANNERS COVERED AN ARC OF ____ DEGREES AT A ANGLE OF TYPICALLY ___ DEGREES AROUND THE PATIENT

Answer 21

180/5

Question 22

WHAT ARE THE TWO MOST IMPORTANT FACTORS OF THE 2ND GENERATION SCANNERS?

Answer 22

FAN BEAM GEOMETRY AND THE INTRODUCTION OF THE DETECTOR ARRAY

Question 23

3RD GENERATION SCANNERS WERE INTRODUCED IN WHAT YEAR?

Answer 23

1975

Question 24

THE ADVANCEMENT IN THE 3RD GENERATION SCANNER IS IN THE DETECTOR ARRAY WHICH IS ARRANGED IN A _______, RATHER THAN IN A STRAIGHT LINE AS THE 2ND GENERATION SYSTEMS.

Answer 24

CURVED ARC

Question 25

3RD GENERATION SCANNERS THE X-RAY TUBE GENERATES X-RAYS WITH FAN BEAM GEOMETRY ADN THE DETECTOR ARRAY ROTATES WITH THE TUBE IN THE TUBE/DETECTOR ASSEMBLY IN THE GANTRY

Answer 25

TRUE

Question 26

Most scanners available today are based on _______ generation technology

Answer 26

third

Question 27

4th Generation Scanners have fan beam, multiple detectors that encircle the patient and do not rotate. Only the tube rotates around the patient.

Answer 27

TRUE

Question 28

MOST CONTINUOUS SCANNERS USE _________TECHNOLOGY

Answer 28

SLIP RING

Question 29

THE _______IS A LARGE, ROTATING RING WHICH SURROUNDS THE GANTRY APERTURE AND WHICH ELIMINATES THE WINDING UP OF THE HIGH-TENSION CABLE FROM THE HIGH FREQUENCY GENERATOR

Answer 29

SLIP RING

Question 30

THE SLIP RING TRANSFERS:_______,________,_______ BETWEEN STATIONARY COMPONENTS AND ROTATING GANTRY COMPONENTS.

Answer 30

1-ELECTRICAL POWER
2- SCANNING INSTRUCTIONS
3- DETECTED SIGNALS

Question 31

BY LATE _____ ALL OF THE MAJOR MANUFACTURERS OFFERED MULTI-ROW DETECTOR SCANNERS.

Answer 31

1998

Question 32

IN ORDER TO COLLECT MULTIPLE SLICES IN EACH ROTATION, THE CT SCANNERS MUST USE A VERY_____X-RAY BEAM AND HAVE MULTIPLE _______ DETECTOR ARRAYS

Answer 32

THICK

PARALLEL

Question 33

OTHER NAMES FOR MULIT-ROW DETECTOR SCANNERS ARE:

Answer 33

MDCT
MUTLI-SLICE SCANNERS
MSCT
MULTI-ARRAY SCANNERS

Question 34

MULTI-ROW DETECTORS SCANNERS COLLECT INFORMATION FROM ________ANATOMICAL SLICES IN EACH ROTATION OF THE X-RAY TUBE.

Answer 34

MULTIPLE

Question 35

MULTI-ROW DETECTOR SCANNERS HAVE MULTPLE, ______ DETECTOR ARRAYS THAT USE A THIRD GENERATION TYPE OF ARCHITECTURE

Answer 35

PARALLEL

Question 36

TO DETERMINE THE ACQUIRED SECTION THICKNESS, THE ______ XRAY BEAM IS MEASURED BY THE MULTIPLE, PARALLEL DETECTOR ARRAYS, THE THICKNESS OF THE BEAM IS DIVIDED OVER THE TOTAL NUMBER OF ROWS OF DETECTOR.

Answer 36

TRUE

Question 37

WHEN A THICK X-RAY BEAM IS USED, NOT ONLY DOES THE BEAM SPREAD OUT LIKE A FAN, BUT IT ALSO DIVERGES ALONG THE DIRECTION OF THE PATIENT TABLE LIKE A _______.

Answer 37

CONE

Question 38

ANATOMY CAN BE SCANNED MORE QUICKLY ON MULTI-ROW DETECTOR SCANNERS THAN ON SINGLE ROW DETECTOR SCANNERS.

Answer 38

TRUE

Question 39

EBCT STANDS FOR?

Answer 39

ELECTRON BEAM CT SCANNER

Question 40

SINCE THERE ARE NO MOVING PARTS ON THE EBCT REQUIRED TO GENERATE, MOVE OR DETECT THE X-RAY BEN, IT IS AN EXTREMELY FAST SCANNER, COMPLETING A “ROTATION” IN APPROXIMATELY ____ TO ____ MILLISECONDS

Answer 40

50 TO 100

Question 41

EBCT HAS VERY FAST SCAN TIMES MAKING IT SUITED FOR ______ AND ______ IMAGING

Answer 41

CARDIAC

CORONARY ARTERY

Question 42

______ IMAGING S THE COMPARISON OF 2 IMAGING MODALITIES YIELDING CO-REGISTERED IMAGES

Answer 42

FUSION