SU-E-I-55: An Automated Technique to Determine Patient Size for Obtaining Size Specific Dose Estimates From System Reported CT Dose Index

2013 ◽  
Vol 40 (6Part5) ◽  
pp. 137-137
Author(s):  
J Dave ◽  
V Zohrabian ◽  
E Gingold
Keyword(s):  
Ct Dose ◽  
Patient Size ◽  
Ct Dose Index ◽  
Automated Technique ◽  
Dose Index

Reduced Kilovoltage in Computed Tomography–Guided Intervention in a Community Hospital: Effect on the Radiation Dose

2014 ◽  
Vol 65 (4) ◽  
pp. 345-351 ◽  
Author(s):  
Saman Rezazadeh ◽  
Steven J. Co ◽  
Simon Bicknell
Keyword(s):  
Low Dose ◽  
Effective Diameter ◽  
Tube Voltage ◽  
Dose Length Product ◽  
Ct Guided ◽  
Ct Dose ◽  
Patient Size ◽  
Ct Dose Index ◽  
Volume Ct ◽  
Dose Index

Purpose The purpose of this study was to determine whether low-kilovoltage (80 or 100 kV) computed tomography (CT)-guided interventions performed in a community-based hospital are feasible and to compare radiation exposure incurred with conventional 120 kV potential. Materials and Methods Effective doses (ED) received by patients who underwent CT-guided intervention were analysed before and after a low-dose kilovoltage protocol was instituted in our department. We performed CT-guided procedures of 93 consecutive patients by using conventional 120-kV tube voltage (50 patients) and a low voltage of 80 or 100 kV for the remainder of this cohort. Automatic tube current modulation was enabled to obtain the best image quality. Procedure details were prospectively recorded and included examination site and type, slice width, tube voltage and current, dose length product, volume CT dose index, and size-specific dose estimate. Dose length product was converted to ED to account for radiosensitivity of specific organs. Statistical comparisons with test differences in the ED, volume CT dose index, size-specific dose estimate, and effective diameter (patient size) were made by using the Student t test. Results All but 6 of the procedures performed at 80 kV were successful, for a success rate of 86%. At lower voltages, the ED was significantly ( P < .01) reduced, on average, by 57%, 73%, and 65% for the pelvic, chest, and abdomen procedures, respectively. Conclusion A low-dose radiation technique by using 80 or 100 kV results in a high technical success rate for pelvic, chest, and abdomen CT-guided interventional procedures, although dramatically decreasing radiation exposure. There was no significant difference in effective diameter (patient size) between the conventional and the low-dose groups, which would suggest that dose reduction was indeed a result of kVp change and not patient size.

scholarly journals New Concept and Procedure for Helical CT Dose Index

1997 ◽  
Vol 53 (11) ◽  
pp. 1657-1664
Author(s):  
YOSHIHISA MURAMATSU ◽  
KOUZOU HANAI ◽  
SYOUICHI KATSUTA ◽  
YASUYUKI FUJITA
Keyword(s):  
Helical Ct ◽  
Ct Dose ◽  
Ct Dose Index ◽  
Dose Index

SU-E-I-50: The ACR CT Dose Index Registry: Implementation Challenges and Preliminary Data

2012 ◽  
Vol 39 (6Part4) ◽  
pp. 3636-3636
Author(s):  
K Kanal ◽  
D Zamora ◽  
C Price ◽  
J Robinson ◽  
W Shuman
Keyword(s):  
Preliminary Data ◽  
Implementation Challenges ◽  
Ct Dose ◽  
Ct Dose Index ◽  
Dose Index

TH-EF-BRA-08: Extending the Concept of Weighted CT Dose Index to Elliptical Phantoms of Various Aspect Ratios

2015 ◽  
Vol 42 (6Part44) ◽  
pp. 3746-3746
Author(s):  
A Markovich ◽  
A Morgan ◽  
F Dong ◽  
A Primak ◽  
X Li
Keyword(s):  
Ct Dose ◽  
Aspect Ratios ◽  
Ct Dose Index ◽  
Dose Index

Organ doses can be estimated from the computed tomography (CT) dose index for cone-beam CT on radiotherapy equipment

2016 ◽  
Vol 36 (2) ◽  
pp. 215-229 ◽  
Author(s):  
Colin J Martin ◽  
Abdullah Abuhaimed ◽  
Marimuthu Sankaralingam ◽  
Mohamed Metwaly ◽  
David J Gentle
Keyword(s):  
Computed Tomography ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Organ Doses ◽  
Ct Dose ◽  
Ct Dose Index ◽  
Dose Index
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