TY  - CHAP
M1  - Book, Section
TI  - Computed Tomography Guidance in Pain Management
A1  - Chandra, Ronil V.
A1  - Mazwi, Thabele-Leslie
A1  - Oh, Daniel
A1  - Yoo, Albert J.
A1  - Hirsch, Joshua A.
A2  - Diwan, Sudhir
A2  - Staats, Peter S.
PY  - 2015
T2  - Atlas of Pain Medicine Procedures
AB  - Computed  tomography  (CT)  creates  an  image  of  the  body  by  reconstructing  image  slices  from  a  series  of  x-ray  projections  acquired  as  the  patient  is  moved  through  the  center  of  the  CT  scanner.  The  CT  scanner  is  able  to  measure  the  attenuation  of  the  x-ray  beam  by  the  various  tissues  along  each  projection.  The  spatial  localization  of  these  tissues  is  then  determined  using  mathematical  algorithms.The  CT  image  is  then  displayed  as  a  matrix  of  x-ray  attenuation  values  using  a  reference  scale  (Hounsfield  units  [HU])  relative  to  water;  water  is  assigned  a  value  of  0  HU  on  all  scanners.  On  this  scale,  air  measures  approximately  −1000  HU  and  dense  cortical  bone  approximately  +1000  HU.A  CT  image  can  be  displayed  as  different  shades  of  grey  by  appropriately  choosing  the  display  parameters.All  current  CT  scanners  offer  multi-detector  technology  (multiple  CT  slices  can  be  obtained  in  one  rotation  of  the  gantry)  and  enable  isotropic  acquisition  (ie,  spatial  resolution  is  equal  in  x,  y,  and  z  planes)  with  volumetric  multi-planar  image  reconstruction.  
SN  - 
PB  - McGraw-Hill Education
CY  - New York, NY
Y2  - 2024/04/18
UR  - accessanesthesiology.mhmedical.com/content.aspx?aid=1107195720
ER  -