FRCR MCQ ---CHARACTERISTIC CURVE

FRCR MCQ ---CHARACTERISTIC CURVE

146.True regarding characteristic curve .

a.average gradient and speed is expressed in numeric terms

b.latitude of a film varies proportionally  with film contrast

c.latitude refers to the range of kVp

d.latitude is defined to produce a density within accepted range for diagnostic radiology(0.25 to 2.0)

e.more room for error in exposure in case of low  latitude film

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Q AND A OF PREVIOUS BLOG==============

MCQ --GRID

88.True regarding grid----

a.strips are slightly angled in cross-section of focused grid

b.parallel grid has well defined convergent line

c.the focusing range  is fairly narrow for  a low-ratio grid

d.parallel grid is frequently used in fluoroscopic spot film 

devices

e.grid cassette is usually used for portable radiography

88.ade----Strips are slightly angled in cross-section of

 focused grid whereas it is parallel in parallel 

grid.Parallel grid  are focused at infinity ,so they donot 

have of a convergent line.the convergent line is noted in

 linear focused  grid .the convergent point is noted in

 crossed grid.The focusing range  is fairly wide  and

 narrow for a high –ratio grid. 

----[Chapter 8,Page 100,  4^th edition ,1990  reprinted 2010 , Christensen’s Physics of Diagnostic radiology]

FRCR MCQ---GRID

MCQ --GRID

88.True regarding grid----

a.strips are slightly angled in cross-section of focused grid

b.parallel grid has well defined convergent line

c.the focusing range  is fairly narrow for  a low-ratio grid

d.parallel grid is frequently used in fluoroscopic spot film devices

e.grid cassette is usually used for portable radiography

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FRCR PART 1 (e-book)

MCQs RADIOPHYSICS (MRI AND USG)

by NAGENDRA KUMAR SINHA (write a review)

Type: e-book
Genre: Diet & Health, Medicine & Science
Language: English
Price: Rs.225.00

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Q AND A OF PREVIOUS BLOG==============

  MCQ Computed radiography

119.True regarding computed radiography 

a.the laser light and stimulated emission has same wavelength

b.a photostimulable phosphor have a very large dynamic range compared to film

c.the photostimulable phosphor can record exposure difference of about 10000:1

d.dynamic range of photostimulable phosphor  is non linear

e.wide latitude system decrease the need for repeat exposure

119.bce---The laser light and stimulated emission has different  wavelength.Dynamic range of photostimulable phosphor  is linear. ---[Chapter 9,Page 133-35,  4^th edition ,1990  reprinted 2010 , Christensen’s Physics of Diagnostic radiology].

FRCR MCQ --- Computed radiography

                                                  MCQ Computed radiography

119.True regarding computed radiography 

a.the laser light and stimulated emission has same wavelength

b.a photostimulable phosphor have a very large dynamic range compared to film

c.the photostimulable phosphor can record exposure difference of about 10000:1

d.dynamic range of photostimulable phosphor  is non linear

e.wide latitude system decrease the need for repeat exposure

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FRCR PART 1 (e-book)

MCQs RADIOPHYSICS (MRI AND USG)

by NAGENDRA KUMAR SINHA (write a review)

Type: e-book
Genre: Diet & Health, Medicine & Science
Language: English
Price: Rs.225.00

Available Formats: PDF Immediate Download on Full Payment

   

Descripton of "FRCR PART 1 (e-book)"

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Q AND A OF PREVIOUS BLOG==============

 Scintillation detectors

Q.True regarding scintillation detectors---

a.  cadmium tungstate doenot have afterglow problem

b.  with rotate-fixed geometry ,alignment between rotaing x ray       tube and fixed detectors is fixed

c.  highly efficient crystal reduces crosstalk

d.  detectors with high stopping power promote crosstalk

e.  crosstalk  reduces resolution

ANS---.ace--- With rotate-fixed geometry ,alignment between rotaing x ray tube and fixed detectors is constantly changing because the geometry dictates that the detectors must be aligned with the center of rotation and the x ray tube. Detectors with high stopping power reduce crosstalk. ---[Chapter 15,Page 299,  4^th edition ,1990  reprinted 2010 , Christensen’s Physics of Diagnostic radiology].

FRCR MCQ----Scintillation detectors

                                                           Scintillation detectors

Q.True regarding scintillation detectors---

a.  cadmium tungstate doenot have afterglow problem

b.  with rotate-fixed geometry ,alignment between rotaing x ray       tube and fixed detectors is fixed

c.  highly efficient crystal reduces crosstalk

d.  detectors with high stopping power promote crosstalk

e.  crosstalk  reduces resolution

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FRCR PART 1 (e-book)

MCQs RADIOPHYSICS (MRI AND USG)

by NAGENDRA KUMAR SINHA (write a review)

Type: e-book
Genre: Diet & Health, Medicine & Science
Language: English
Price: Rs.225.00

Available Formats: PDF Immediate Download on Full Payment

   

Descripton of "FRCR PART 1 (e-book)"

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Q AND A OF PREVIOUS BLOG==============

205.True regarding 4^th generation CT scan

a.the detectors donot move

b.the detectors form a ring that completely surrounds the patients

c.the x ray tube rotates in a circle outside the detector ring

d.there is   clear advantage of 4^rd generation over  3^th generation scanner

e.some designs have more than 2000 detectors

205.abe--- ---- The x ray tube rotates in a circle inside the detector ring in the 4^th generation CT scan.There is no clear advantage of 4^rd and 3^th generation over each other.[Chapter 15,Page 295-96,  4^th edition ,1990  reprinted 2010 , Christensen’s Physics of Diagnostic radiology].

FRCR MCQ ---4TH GGENERATION CT SCAN

4^th generation CT scan

205.True regarding 4^th generation CT scan

a.the detectors donot move

b.the detectors form a ring that completely surrounds the patients

c.the x ray tube rotates in a circle outside the detector ring

d.there is   clear advantage of 4^rd generation over  3^th generation scanner

e.some designs have more than 2000 detectors

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Q AND A OF PREVIOUS BLOG==============

105.True regarding intensifying screen is/are

a. polyester plastic used as screen support

b.reflecting coat  made of titanium dioxide

c.phosphor crystals remain suspended in a plastic            containing substance

d.protective layer largely composed of cellulose compound

e.reflecting layer is indispensible component of screen.

105.acd—Some intensifying screen does not have reflecting layer ,so it reflecting layer is not indispensible component of screen.Reflecting coat  is made of white  substance (titanium dioxide) .

[Chapter 9,Page 119,  4^th edition ,1990  reprinted 2010 , Christensen’s Physics of Diagnostic radiology].

FRCR MCQ ----INTENSIFYING SCREEN

FRCR  MCQ ----INTENSIFYING SCREEN 

105.True regarding intensifying screen is/are

a. polyester plastic used as screen support

b.reflecting coat  made of titanium dioxide

c.phosphor crystals remain suspended in a plastic containing 

substance

d.protective layer largely composed of cellulose compound

e.reflecting layer is indispensible component of screen.

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Q AND A OF PREVIOUS BLOG==============

195.True regarding MTF is/are

a.describe the ability of imaging system to reproduce the information

b.an MTF of 0 (zero)  is a perfect system

c.MTF of focal spot  increases with magnification used

d. intensifying screen MTF decreases with magnification

e.magnification reduces the frequency of information to be resolved 

ANS-----abe--MTF of focal spot decreases  with magnification 

used,larger the focal spot more drastic the deterioration of MTF .

 Intensifying screen MTF increases with magnification as 

magnification reduces the frequency of information to be 

resolved . ---.[Chapter 15,Page 235-36,  4^th edition ,1990  

reprinted 2010 , Christensen’s Physics of 189. Diagnostic 

radiology].

FRCR PART 1 (e-book)

MCQs RADIOPHYSICS (MRI AND USG)

by NAGENDRA KUMAR SINHA (write a review)

Type: e-book
Genre: Diet & Health, Medicine & Science
Language: English
Price: Rs.225.00

Available Formats: PDF Immediate Download on Full Payment

   

- See more at: http://pothi.com/pothi/book/ebook-nagendra-kumar-sinha-frcr-part-1#sthash.K1Tha5x9.dpuf