nach oben

European Radiology

Erschienen in:

01.08.2012 | Computed Tomography

Impact of iterative reconstruction on image quality and radiation dose in multidetector CT of large body size adults

verfasst von: Gaurav S. Desai, Raul N. Uppot, Elaine W. Yu, Avinash R. Kambadakone, Dushyant V. Sahani

Erschienen in: European Radiology | Ausgabe 8/2012

Einloggen, um Zugang zu erhalten

Abstract

Objective

To compare image quality and radiation dose using Adaptive Statistical Iterative Reconstruction (ASiR) and Filtered Back Projection (FBP) in patients weighing ≥91 kg.

Methods

In this Institution Review Board-approved retrospective study, single-phase contrast-enhanced abdominopelvic CT examinations of 100 adults weighing ≥91 kg (mean body weight: 107.6 ± 17.4 kg range: 91–181.9 kg) with (1) ASiR and (2) FBP were reviewed by two readers in a blinded fashion for subjective measures of image quality (using a subjective standardized numerical scale and objective noise) and for radiation exposure. Imaging parameters and radiation dose results of the two techniques were compared within weight and BMI sub-categories.

Results

All examinations were found to be of adequate quality. Both subjective (mean = 1.4 ± 0.5 vs. 1.6 ± 0.6, P < 0.05) and objective noise (13.0 ± 3.2 vs.19.5 ± 5.7, P < 0.0001) were lower with ASiR. Average radiation dose reduction of 31.5 % was achieved using ASiR (mean CTDIvol. ASiR: 13.5 ± 7.3 mGy; FBP: 19.7 ± 9.0 mGy, P < 0.0001). Other measures of image quality were comparable between the two techniques. Trends for all parameters were similar in patients across weight and BMI sub-categories.

Conclusion

In obese individuals, abdominal CT images reconstructed using ASiR provide diagnostic images with reduced image noise at lower radiation dose.

Key Points

• CT images in obese adults are noisy, even with high radiation dose.

• Newer iterative reconstruction techniques have theoretical advantages in obese patients.

• Adaptive statistical iterative reconstruction should reduce image noise and radiation dose.

• This has been proven in abdominopelvic CT images of obese patients.

Steinbrook R (2004) Surgery for severe obesity. N Engl J Med 350:1075–1079PubMedCrossRef

Buckley O, Ward E, Ryan A, Colin W, Snow A, Torreggiani WC (2009) European obesity and the radiology department. What can we do to help? Eur Radiol 19:298–309PubMedCrossRef

Santry HP, Gillen DL, Lauderdale DS (2005) Trends in bariatric surgical procedures. JAMA 294:1909–1917PubMedCrossRef

Schindera ST, Nelson RC, Yoshizumi T et al (2009) Effect of automatic tube current modulation on radiation dose and image quality for low tube voltage multidetector row CT angiography: phantom study. Acad Radiol 16:997–1002PubMedCrossRef

Marin D, Nelson RC, Schindera ST et al (2010) Low-tube-voltage, high-tube-current multidetector abdominal CT: improved image quality and decreased radiation dose with adaptive statistical iterative reconstruction algorithm – initial clinical experience. Radiology 254:145–153PubMedCrossRef

Uppot RN, Sahani DV, Hahn PF, Kalra MK, Saini SS, Mueller PR (2006) Effect of obesity on image quality: fifteen year longitudinal study for evaluation of dictated radiology reports. Radiology 240:435–439PubMedCrossRef

Goldman LW (2007) Principles of CT: radiation dose and image quality. J Nucl Med Technol 35:213–225PubMedCrossRef

Schindera ST, Nelson RC, Toth TL, Nguyen GT, Toncheva GI, DeLong DM et al (2008) Effect of patient size on radiation dose for abdominal MDCT with automatic tube current modulation: phantom study. AJR Am J Roentgenol 190:W100–105PubMedCrossRef

Razinia T, Saver JL, Liebeskind DS, Ali LK, Buck B, Ovbiagele B (2007) Body mass index and hospital discharge outcomes after ischemic stroke. Arch Neurol 64:388–391PubMedCrossRef

10.

Martino JL, Stapleton RD, Wang M, Day AG, Cahill NE, Dixon AE (2011) Extreme obesity and outcomes in critically Ill patients. Chest 140:1198–1206PubMedCrossRef

11.

Mancini JG, Raymundo EM, Lipkin M, Zilberman D, Yong D, Bañez LL et al (2010) Factors affecting patient radiation exposure during percutaneous nephrolithotomy. J Urol 184:2373–2377PubMedCrossRef

12.

Letsas KP, Siklódy CH, Korantzopoulos P, Weber R, Bürkle G, Mihas CC et al (2011) The impact of body mass index on the efficacy and safety of catheter ablation of atrial fibrillation. Int J Cardiol. doi:10.1016/j.ijcard.2011.06.092

13.

Sousa PJ, Gonçalves PA, Marques H, Raposo L, Calé R, Brito J et al (2010) Radiation in cardiac CT: predictors of higher dose and its reduction over time. Rev Port Cardiol 29:1655–1665PubMed

14.

Rundle RL (2002) U.S.'s obesity woes put a strain on hospitals in unexpected ways. Wall Street Journal Online Edition. online.wsj.com/article/0,,SB1020194636122710680.djm,00.html. Accessed November 30, 2006

15.

Flegal KM, Carroll MD, Ogden CL, Curtin LR (2010) Prevalence and trends in obesity among US adults, 1999-2008. JAMA 303:235–241PubMedCrossRef

16.

Amis ES, Butler PF, Applegate KE, Birnbaum SB, Brateman LF, Hevezi JM et al (2007) White paper on radiation dose in medicine. J Am Coll Radiol 4:272–284PubMedCrossRef

17.

Frush DP, Applegate K (2004) Computed tomography and radiation: understanding the issues. J Am Coll Radiol 1:113–119PubMedCrossRef

18.

Schauer DA, Linton OW (2009) National council on radiation protection and measurements report shows substantial medical exposure increase. Radiology 253:293–296PubMedCrossRef

19.

Brenner DJ, Hall EJ (2007) Computed tomography – an increasing source of radiation exposure. N Engl J Med 357:2277–2284PubMedCrossRef

20.

Berrington de González A, Mahesh M, Kim KP, Bhargavan M, Lewis R, Mettler F et al (2009) Projected cancer risks from computed tomographic scans performed in the United States in 2007. Arch Intern Med 169:2071–2077PubMedCrossRef

21.

Mettler FA Jr, Bhargavan M, Faulkner K, Gilley DB, Gray JE, Ibbott GS et al (2009) Radiologic and nuclear medicine studies in the United States and worldwide: frequency, radiation dose, and comparison with other radiation sources - 1950-2007. Radiology 253:520–531PubMedCrossRef

22.

Schauer DA, Linton OW (2009) NCRP report no. 160, ionizing radiation exposure of the population of the united states, medical exposure – are we doing less with more, and is there a role for health physicists? Health Phys 97:1–5PubMedCrossRef

23.

Reid J, Gamberoni J, Dong F, Davros W (2010) Optimization of kVp and mAs for pediatric low-dose simulated abdominal CT: is it best to base parameter selection on object circumference? AJR Am J Roentgenol 195:1015–1020PubMedCrossRef

24.

Mulkens TH, Bellinck P, Baeyaert M, Ghysen D, Van Dijck X, Mussen E et al (2005) Use of an automatic exposure control mechanism for dose optimization in multi-detector row CT examinations: clinical evaluation. Radiology 237:213–223PubMedCrossRef

25.

Stiller W, Schwarzwaelder CB, Sommer CM, Veloza S, Radeleff BA, Kauczor HU (2011) Dual-energy, standard and low-kVp contrast-enhanced CT-cholangiography: A comparative analysis of image quality and radiation exposure. Eur J Radiol. doi:10.1016/j.ejrad.2011.03.030

26.

Graser A, Wintersperger BJ, Suess C, Reiser MF, Becker CR (2006) Dose reduction and image quality in MDCT colonography using tube current modulation. AJR Am J Roentgenol 187:695–701PubMedCrossRef

27.

Poletti PA, Platon A, Rutschmann OT, Schmidlin FR, Iselin CE, Becker CD (2007) Low-dose versus standard-dose CT protocol in patients with clinically suspected renal colic. AJR Am J Roentgenol 188:927–933PubMedCrossRef

28.

Schindera ST, Nelson RC, Lee ER, Delong DM, Ngyen G, Toncheva G et al (2007) Abdominal multislice CT for obese patients: effect on image quality and radiation dose in a phantom study. Acad Radiol 14:486–494PubMedCrossRef

29.

Kalra MK, Maher MM, D'Souza RV, Rizzo S, Halpern EF, Blake MA et al (2005) Detection of urinary tract stones at low-radiation-dose CT with z-axis automatic tube current modulation: phantom and clinical studies. Radiology 235:523–529PubMedCrossRef

30.

Silva AC, Lawder HJ, Hara A, Kujak J, Pavlicek W et al (2010) Innovations in CT dose reduction strategy: application of the adaptive statistical iterative reconstruction algorithm. AJR Am J Roentgenol 194:191–199PubMedCrossRef

31.

McCollough CH, Bruesewitz MR, Kofler JM Jr (2006) CT dose reduction and dose management tools: overview of available options. Radiographics 26:503–512PubMedCrossRef

32.

McCollough CH, Primak AN, Braun N, Kofler J, Yu L, Christner J (2009) Strategies for reducing radiation dose in CT. Radiol Clin North Am 47:27–40PubMedCrossRef

33.

Cornfeld D, Israel G, Detroy E, Bokhari J, Mojibian H (2011) Impact of adaptive statistical iterative reconstruction (ASIR) on radiation dose and image quality in aortic dissection studies: a qualitative and quantitative analysis. AJR Am J Roentgenol 196:W336–340PubMedCrossRef

34.

Leipsic J, Labounty TM, Heilbron B, Min JK, Mancini GB, Lin FY et al (2010) Adaptive statistical iterative reconstruction: assessment of image noise and image quality in coronary CT angiography. AJR Am J Roentgenol 195:649–654PubMedCrossRef

35.

Kambadakone AR, Chaudhary NA, Desai GS, Nguyen DD, Kulkarni NM, Sahani DV (2011) Low-dose MDCT and CT enterography of patients with crohn disease: feasibility of adaptive statistical iterative reconstruction. AJR Am J Roentgenol 196:W743–752PubMedCrossRef

36.

Yanagawa M, Honda O, Yoshida S, Kikuyama A, Inoue A, Sumikawa H et al (2010) Adaptive statistical iterative reconstruction technique for pulmonary CT: image quality of the cadaveric lung on standard- and reduced-dose CT. Acad Radiol 17:1259–1266PubMedCrossRef

37.

Prakash P, Kalra MK, Kambadakone AK, Pien H, Hsieh J, Blake MA et al (2010) Reducing abdominal ct radiation dose with adaptive statistical iterative reconstruction technique. Invest Radiol 45:202–210PubMedCrossRef

38.

Flicek KT, Hara AK, Silva AC, Wu Q, Peter MB, Johnson CD (2010) Reducing the radiation dose for CT colonography using adaptive statistical iterative reconstruction: a pilot study. AJR Am J Roentgenol 195:126–131PubMedCrossRef

39.

Moscariello A, Takx RA, Schoepf UJ, Renker M, Zwerner PL, O'Brien TX et al (2011) Coronary CT angiography: image quality, diagnostic accuracy, and potential for radiation dose reduction using a novel iterative image reconstruction technique-comparison with traditional filtered back projection. Eur Radiol 21:2130–2138PubMedCrossRef

40.

Ghetti C, Ortenzia O, Serreli G (2011) CT iterative reconstruction in image space: a phantom study. Phys Med. doi:10.1016/j.ejmp.2011.03.003

41.

Bittencourt MS, Schmidt B, Seltmann M, Muschiol G, Ropers D, Daniel WG et al (2011) Iterative reconstruction in image space (IRIS) in cardiac computed tomography: initial experience. Int J Cardiovasc Imaging 27:1081–1087PubMedCrossRef

42.

Pontana F, Duhamel A, Pagniez J, Flohr T, Faivre JB, Hachulla AL et al (2011) Chest computed tomography using iterative reconstruction vs filtered back projection (Part 2): image quality of low-dose CT examinations in 80 patients. Eur Radiol 21:636–643PubMedCrossRef

43.

Pontana F, Pagniez J, Flohr T, Faivre JB, Duhamel A, Remy J et al (2011) Chest computed tomography using iterative reconstruction vs filtered back projection (Part 1): evaluation of image noise reduction in 32 patients. Eur Radiol 21:627–635PubMedCrossRef

44.

Schindera ST, Diedrichsen L, Müller HC, Rusch O, Marin D, Schmidt B et al (2011) Iterative reconstruction algorithm for abdominal multidetector ct at different tube voltages: assessment of diagnostic accuracy, image quality, and radiation dose in a phantom study. Radiology 260:454–462PubMedCrossRef

45.

Halpern E, Mehta D, Read K, Levin D et al (2011) Iterative reconstruction technique provides noise reduction and improved image quality for coronary CT angiography. Scientific session 25 – Cardiopulmonary imaging: cardiac. AJR Am J Roentgenol 196:A81–A84, abstract 215

46.

EUR 16262 EN (2011) Quality criteria for computed tomography. www.drs.dk/guidelines/ct/quality/Download.htm. Accessed 8 January 2011

47.

Huda W, Ogden KM, Khorasani MR (2008) Converting dose-length product to effective dose at CT. Radiology 248:995–1003PubMedCrossRef

48.

Landis JR, Koch GG (1977) The measurement of observer agreement for categorical data. Biometrics 33:159–174PubMedCrossRef

49.

Goldman LW (2007) Principles of CT and CT technology. J Nucl Med Technol 35:115–128PubMedCrossRef

50.

Zhao J, Jin Y, Lu Y, Wang G (2009) Filtered backprojection algorithm for triple-source helical cone-beam CT. IEEE Trans Med Imaging 28:384–393PubMedCrossRef

51.

Lu Y, Katsevich A, Zhao J, Yu H, Wang G (2010) Fast exact/quasi-exact FBP algorithms for triple source helical cone-beam CT. IEEE Trans Med Imaging 29:756–770PubMedCrossRef

52.

Thibault JB, Sauer K, Bouman CA, Hsieh J (2007) A three-dimensional statistical approach to improved image quality for multislice helical CT. Med Phys 34:4526–4544PubMedCrossRef

53.

May MS, Wüst W, Brand M, Stahl C, Allmendinger T, Schmidt B et al (2011) Dose reduction in abdominal computed tomography: intraindividual comparison of image quality of full-dose standard and half-dose iterative reconstructions with dual-source computed tomography. Invest Radiol 46:465–470PubMedCrossRef

54.

Hara AK, Paden RG, Silva AC, Kujak JL, Lawder HJ, Pavlicek W (2009) Iterative reconstruction technique for reducing body radiation dose at CT: feasibility study. AJR Am J Roentgenol 193:764–771PubMedCrossRef

55.

Singh S, Kalra MK, Hsieh J, Licato PE, Do S, Pien HH et al (2010) Abdominal CT: comparison of adaptive statistical iterative and filtered back projection reconstruction techniques. Radiology 257:373–383PubMedCrossRef

56.

Haaga JR, Miraldi F, MacIntyre W, LiPuma JP, Bryan PJ, Wiesen E (1981) The effect of mAs variation upon computed tomography image quality as evaluated by in vivo and in vitro studies. Radiology 138:449–454PubMed

57.

Israel GM, Cicchiello L, Brink J, Huda W et al (2010) Patient size and radiation exposure in thoracic, pelvic, and abdominal CT examinations performed with automatic exposure control. AJR Am J Roentgenol 195:1342–1346PubMedCrossRef

Titel: Impact of iterative reconstruction on image quality and radiation dose in multidetector CT of large body size adults
verfasst von: Gaurav S. Desai
Raul N. Uppot
Elaine W. Yu
Avinash R. Kambadakone
Dushyant V. Sahani
Publikationsdatum: 01.08.2012
Verlag: Springer-Verlag
Erschienen in: European Radiology / Ausgabe 8/2012
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-012-2424-3

Update Radiologie

Bestellen Sie unseren Fach-Newsletter und bleiben Sie gut informiert.

Newsletter bestellen

Springer Medizin

Impact of iterative reconstruction on image quality and radiation dose in multidetector CT of large body size adults

Abstract

Objective

Methods

Results

Conclusion

Key Points

Neu im Fachgebiet Radiologie

Akuter Schwindel: Wann lohnt sich eine MRT?

Screening-Mammografie offenbart erhöhtes Herz-Kreislauf-Risiko

S3-Leitlinie zu Pankreaskrebs aktualisiert

Fünf Dinge, die im Kindernotfall besser zu unterlassen sind

Update Radiologie

Springer Medizin

Abstract

Objective

Methods

Results

Conclusion

Key Points

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

Weitere Artikel der Ausgabe 8/2012

Perfusion pattern of musculoskeletal masses using contrast-enhanced ultrasound: a helpful tool for characterisation?

Significance of pulmonary nodules in patients with colorectal cancer

Detectability of low and intermediate or high risk prostate cancer with combined T2-weighted and diffusion-weighted MRI

Perfusion MRI for the prediction of treatment response after preoperative chemoradiotherapy in locally advanced rectal cancer

Electro-mechanical characteristics of myocardial infarction border zones and ventricular arrhythmic risk: novel insights from grid-tagged cardiac magnetic resonance imaging

Assessment of the metabolic flow phenotype of primary colorectal cancer: correlations with microvessel density are influenced by the histological scoring method

Neu im Fachgebiet Radiologie

Akuter Schwindel: Wann lohnt sich eine MRT?

Screening-Mammografie offenbart erhöhtes Herz-Kreislauf-Risiko

S3-Leitlinie zu Pankreaskrebs aktualisiert

Fünf Dinge, die im Kindernotfall besser zu unterlassen sind

Update Radiologie