Assessment of Imaging Protocol and Patients Radiation Exposure in Computed Tomography Colonography
Abstract
:1. Introduction
2. Materials and Methods
2.1. Population
2.2. CT Equipment
2.3. CTC Protocol
2.4. Radiation Dosimetry
3. Results and Discussion
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Parameters | Philips | GE |
---|---|---|
Scan type | Helical | Helical |
kVp * | 120 | 120 |
mA * | 100 | 120 |
Collimation (mm) | 40 (64 * 0.625) | 40 (64 * 0.625) |
Rotation time (s) | 0.5 | 0.5 |
Pitch | 1.375 | 1.375 |
SFOV | Large | Large |
Coverage | Diaphragm to ischium | Diaphragm to ischium |
IRT | 40% ASIR | 50% ASIR |
Protocol | Tube Current (mA) | CTDIVOL (mGy) | Effective Dose (MSV) | ||
---|---|---|---|---|---|
Supine | Prone/Decubitus | Supine | Prone/Decubitus | ||
Supine and one decubitus | 266.6 ± 144 (100–350) | 266.6 ± 144 (100–350) | 7.5 ± 4 (2.8–9.8) | 7.5 ± 4 (2.8–9.8) | 13 ± 5.9 (6.1–16.8) |
Supine and two decubitus | 375 ± 106 (300–450) | 375 ± 106 (300–450) | 13.4 ± 1 (12.6–14.2) | 12.2 ± 0.57 (11.8–12.6) | 31.6 ± 0.38 (31.3–31.9) |
Auto tube current (mA) | 253.1 ± 63 (150–325) | 256.2 ± 59 (150–325) | 11.2 ± 5.2 (2.2–18.3) | 10.5 ± 4.7 (2.1–16.5) | 18.7 ± 9.9 (3.06–31.9) |
Routine (manual) | 203 ± 96.3 (100–440) | 202.2 ± 96 (100–440) | 6.4 ± 3.3 (2.7–15.5) | 6.51 ± 3.9 (2.8–19.7) | 9.6 ± 6 (2.1–26.7) |
(A) | ||||||
Mode | Tube Voltage (kVp) | Tube current (mA) | Rotation Time (s) | Pitch | Slice Thickness (mm) | |
Supine | Prone | |||||
Auto mA (Philips) | 120 | 287.5 ± 17 (275–300) | 287.5 ± 17 (275–300) | 0.85 ± 0.02 (0.84–0.87) | 0.9 * | 0.67 * |
Auto mA (GE) | 116.6 ± 8.1 (100–120) | 241.6 ± 70 (150–325) | 245.8 ± 65.9 (150–325) | 0.5 ± 0.1 (0.4–0.7) | 1.1 ± 0.2 (0.98–1.37) | 0.62 * |
Manual mA (GE) | 120 | 212.3 ± 104 (100–450) | 213.2 ± 105.5 (100–450) | 0.52 ± 0.06 (0.5–0.7) | 1.32 ± 0.1 (0.98–1.37) | 0.62 * |
(B) | ||||||
Mode | CTDIvol (mGy) | DLP (mGy.cm) | Effective Dose (mSv) | |||
Supine | Prone | |||||
Auto mA (Philips) | 16.2 ± 2.9 (14.2–18.3) | 14.6 ± 2.6 (12.7–16.5) | 1702.8 ± 436.7 (1394–2011.6) | 25.5 ± 6.5 (20.9–30.1) | ||
Auto mA (GE) | 9.6 ± 4.8 (2.2–14.5) | 9.1 ± 4.6(2.2–15) | 1098.1 ± 686.5 (204–2128.8) | 16.4 ± 10.2 (3.06–31.9) | ||
Manual mA (GE) | 6.6 ± 3.4 (2.7–15.5) | 6.7 ± 3.9 (2.8–19.7) | 690.1 ± 447.3 (145.2–2092.9) | 10.3 ± 6.7 (2.1–31.3) |
Gender | Number | Age (Y) | CTDIVOL (mGy) Supine | CTDIVOL (mGy) Prone | Effective Dose (mSv) |
---|---|---|---|---|---|
M | 25 | 58.64 ± 15.2, 58 (29–83) | 6.7 ± 4.42, 5.63 (2.27–15.56) | 6.5 ± 4.1, 5.6 (2.1–15.58) | 10.3 ± 7.95, 6.92 (2.17–31.9) |
F | 30 | 57.4 ± 12.3, 55 (24–82) | 7.84 ± 3.64, 8.02 (2.79–18.3) | 8.06 ± 4.3, 7.61 (2.8–19.76) | 12.6 ± 7.55, 10.99 (3.88–31.39) |
Total | 55 | 57.96 ± 13.6, 56 (24–83) | 7.33 ± 4, 7.02 (2.2–18.3) | 7.37 ± 4.3, 7.11 (2.2–19.7) | 11.57 ± 7.75, 9.25 (2.17–31.93) |
Standard Imaging Protocol | Modified * | ||||||
---|---|---|---|---|---|---|---|
Authors | Country | CTDIvol (mGy) | DLP (mGy.cm) | Effective Dose (mSv) | CTDIvol (mGy) | DLP (mGy.cm) | Effective Dose (mSv) |
Chang et al. [22] | USA | 5.3 | 239 | 3.6 | 4.1 | 197 | 3.0 |
Nagata et al. [19] | Japan | 2.37 | 118.8 | 1.78 | 1.22 | 47.4 | 0.9 |
Nagata et al. [19] | Japan | 2.53 | 128.2 | 1.92 | 0.92 | 42.2 | 0.7 |
Nagata et al. [19] | Japan | 2.63 | 130.4 | 1.96 | 0.77 | 36.4 | 0.6 |
Nagata et al. [19] | Japan | 2.51 | 123.9 | 1.86 | 0.62 | 29 | 0.5 |
Cianci et al. [18] | Italy | 3.87 | 179.3 | 2.69 | 1.32 | 65.3 | 1.0 |
Liedenbaum et al. [20] | The Netherlands | N/A | 303.3 | 4.55 | N/A | 193.3 | 3.0 |
Millerd et al. [23] | USA | 6.7 | 327.8 | 4.91 | 2.7 | 129.1 | 1.9 |
Current study | Saudi Arabia | 7.3 | 385.5 | 5.7 | 7.3 | 385.5 | 5.7 |
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Alsufayan, M.; Sulieman, A.; Moslem, R.; Asiri, A.; Alomary, A.; Alanazi, B.M.; Aldossari, H.; Alonazi, B.; Bradley, D.A. Assessment of Imaging Protocol and Patients Radiation Exposure in Computed Tomography Colonography. Appl. Sci. 2021, 11, 4761. https://doi.org/10.3390/app11114761
Alsufayan M, Sulieman A, Moslem R, Asiri A, Alomary A, Alanazi BM, Aldossari H, Alonazi B, Bradley DA. Assessment of Imaging Protocol and Patients Radiation Exposure in Computed Tomography Colonography. Applied Sciences. 2021; 11(11):4761. https://doi.org/10.3390/app11114761
Chicago/Turabian StyleAlsufayan, Mohammed, Abdelmoneim Sulieman, Rayan Moslem, Abdullah Asiri, Abdullah Alomary, Bandar M. Alanazi, Hassan Aldossari, Batil Alonazi, and David A. Bradley. 2021. "Assessment of Imaging Protocol and Patients Radiation Exposure in Computed Tomography Colonography" Applied Sciences 11, no. 11: 4761. https://doi.org/10.3390/app11114761