Publications

  1. Millerd PJ, Paden RG, Lund JT, Hara AK, Stiles WL, He M, Wu Q, Daniel Johnson C. Reducing the radiation dose for computed tomography colonography using model-based iterative reconstruction. Abdom Imaging. 2014 Oct 21.
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  2. Lindgren EA, Patel MD, Wu Q, Melikian J, Hara AK. The clinical impact of subspecialized radiologist reinterpretation of abdominal imaging studies, with analysis of the types and relative frequency of interpretation discrepancies. Abdom Imaging. 2014 Oct; 39(5):1119-26.
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  3. Oldan J, He M, Wu T, Silva AC, Li J, Mitchell JR, Pavlicek WM, Roarke MC, Hara AK. Pilot Study: Evaluation of Dual-Energy Computed Tomography Measurement Strategies for Positron Emission Tomography Correlation in Pancreatic Adenocarcinoma. J Digit Imaging. 2014 Jul 04.
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  4. Ehman EC, Yu L, Manduca A, Hara AK, Shiung MM, Jondal D, Lake DS, Paden RG, Blezek DJ, Bruesewitz MR, McCollough CH, Hough DM, Fletcher JG. Methods for clinical evaluation of noise reduction techniques in abdominopelvic CT. Radiographics. 2014 Jul-Aug; 34(4):849-62.
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  5. Naidu SG, Kriegshauser JS, Paden RG, He M, Wu Q, Hara AK. Ultra-low-dose computed tomographic angiography with model-based iterative reconstruction compared with standard-dose imaging after endovascular aneurysm repair: a prospective pilot study. Abdom Imaging. 2014 May 25. [Epub ahead of print]
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  6. Hoxworth JM, Lal D, Fletcher GP, Patel AC, He M, Paden RG, Hara AK. Radiation dose reduction in paranasal sinus CT using model-based iterative reconstruction. AJNR Am J Neuroradiol. 2014 Apr; 35(4):644-9. Epub 2013 Oct 10.
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  7. Del Gaizo AJ, Silva AC, Hara AK. The utility of dual-energy computed tomography in abdominal imaging. Appl Radiol. 2014; 43(1):12-9.
  8. Flicek KT, Hara AK, De Petris G, Pasha SF, Yadav AD, Johnson CD. Diaphragm disease of the small bowel: A retrospective review of CT findings. Am J Roentgenol. 2014; 202(2):W140-5.
  9. Del Gaizo AJ, Fletcher JG, Yu L, Paden RG, Spencer GC, Leng S, Silva AM, Fidler JL, Silva AC, Hara AK. Reducing radiation dose in CT enterography. Radiographics. 2013 Jul-Aug; 33(4):1109-24.
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  10. Hara AK, Wellnitz CV, Paden RG, Pavlicek W, Sahani DV. Reducing body CT radiation dose: beyond just changing the numbers. AJR Am J Roentgenol. 2013 Jul; 201(1):33-40.
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  11. Maia RS, Jacob C, Mitchell JR, Hara AK, Silva AC, Pavlicek W. Parallel multi-material decomposition of dual-energy CT data. Proceedings of CBMS 2013 - 26th IEEE International Symposium on Computer-Based Medical Systems. 2013:465-8.
  12. Qu M, Ehman E, Fletcher JG, Huprich JE, Hara AK, Silva AC, Farrugia G, Limburg P, McCollough CH. Toward biphasic computed tomography (CT) enteric contrast: material classification of luminal bismuth and mural iodine in a small-bowel phantom using dual-energy CT. J Comput Assist Tomogr. 2012 Sep-Oct; 36(5):554-9.
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  13. Johnson CD, Herman BA, Chen MH, Toledano AY, Heiken JP, Dachman AH, Kuo MD, Menias CO, Siewert B, Cheema JI, Obregon R, Fidler JL, Zimmerman P, Horton KM, Coakley KJ, Iyer RB, Hara AK, Halvorsen RA Jr, Casola G, Yee J, Blevins M, Burgart LJ, Limburg PJ, The National CT Colonography Trial: assessment of accuracy in participants 65 years of age and older. Radiology. 2012 May; 263(2):401-8. Epub 2012 Feb 23.
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  14. Yadav A, Heigh RI, Hara AK, Decker GA, Crowell MD, Gurudu SR, Pasha SF, Fleischer DE, Harris LA, Post J, Leighton JA. Performance of the patency capsule compared with nonenteroclysis radiologic examinations in patients with known or suspected intestinal strictures. Gastrointest Endosc. 2011 Oct; 74(4):834-9. Epub 2011 Aug 15.
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  15. Silva AC, Morse BG, Hara AK, Paden RG, Hongo N, Pavlicek W. Dual-energy (spectral) CT: applications in abdominal imaging. Radiographics. 2011 Jul-Aug; 31(4):1031-46; discussion 1047-50.
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  16. Hara AK, Blevins M, Chen MH, Dachman AH, Kuo MD, Menias CO, Siewert B, Cheema JI, Obregon RG, Fidler JL, Zimmerman P, Horton KM, Coakley KJ, Iyer RB, Halvorsen RA Jr, Casola G, Yee J, Herman BA, Johnson CD. ACRIN CT colonography trial: does reader's preference for primary two-dimensional versus primary three-dimensional interpretation affect performance? Radiology. 2011 May; 259(2):435-41. Epub 2011 Mar 01.
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  17. Hara AK, Kuo MD, Blevins M, Chen MH, Yee J, Dachman A, Menias CO, Siewert B, Cheema JI, Obregon RG, Fidler JL, Zimmerman P, Horton KM, Coakley K, Iyer RB, Halvorsen RA Jr, Casola G, Johnson CD. National CT colonography trial (ACRIN 6664): comparison of three full-laxative bowel preparations in more than 2500 average-risk patients. AJR Am J Roentgenol. 2011 May; 196(5):1076-82.
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  18. Siddiki H, Fletcher JG, Hara AK, Kofler JM, McCollough CH, Fidler JL, Guimaraes L, Huprich JE, Sandborn WJ, Loftus EV Jr, Mandrekar J, Bruining DH. Validation of a lower radiation computed tomography enterography imaging protocol to detect Crohn's disease in the small bowel. Inflamm Bowel Dis. 2011 Mar; 17(3):778-86.
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  19. Sagara Y, Hara AK, Pavlicek W, Silva AC, Paden RG, Wu Q. Abdominal CT: comparison of low-dose CT with adaptive statistical iterative reconstruction and routine-dose CT with filtered back projection in 53 patients. AJR Am J Roentgenol. 2010 Sep; 195(3):713-9.
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  20. Flicek KT, Hara AK, Silva AC, Wu Q, Peter MB, Johnson CD. Reducing the radiation dose for CT colonography using adaptive statistical iterative reconstruction: A pilot study. AJR Am J Roentgenol. 2010 Jul; 195(1):126-31.
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  21. Fletcher JG, Chen MH, Herman BA, Johnson CD, Toledano A, Dachman AH, Hara AK, Fidler JL, Menias CO, Coakley KJ, Kuo M, Horton KM, Cheema J, Iyer R, Siewert B, Yee J, Obregon R, Zimmerman P, Halvorsen R, Casola G, Morrin M. Can radiologist training and testing ensure high performance in CT colonography? Lessons From the National CT Colonography Trial. AJR Am J Roentgenol. 2010 Jul; 195(1):117-25.
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  22. Dionisio PM, Gurudu SR, Leighton JA, Leontiadis GI, Fleischer DE, Hara AK, Heigh RI, Shiff AD, Sharma VK. Capsule endoscopy has a significantly higher diagnostic yield in patients with suspected and established small-bowel Crohn's disease: a meta-analysis. Am J Gastroenterol. 2010 Jun; 105(6):1240-8; quiz 1249. Epub 2009 Dec 22.
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  23. Naidu SG, Hara AK, Brandis AR, Stone WM. Incidence of highly important extravascular findings detected on CT angiography of the abdominal aorta and the lower extremities. AJR Am J Roentgenol. 2010 Jun; 194(6):1630-4.
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  24. Siddiki H, Fletcher JG, Hara AK, Kofler JM, McCollough CH, Fidler JL, Guimaraes L, Huprich JE, Sandborn WJ, Loftus EV Jr, Mandrekar J, Bruining DH. Validation of a lower radiation computed tomography enterography imaging protocol to detect Crohn's disease in the small bowel. Inflamm Bowel Dis. 2010 Jun.
  25. Huang A, Li J, Summers RM, Petrick N, Hara AK. Improving Polyp Detection Algorithms for CT Colonography: Pareto Front Approach. Pattern Recognit Lett. 2010 Mar 21; 31(11):1461-9.
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  26. Santamara-Pang A, Dutta S, Makrogiannis S, Hara A, Pavlicek W, Silva A, Thomasen Brian, Robertson S, Okerlund D, Langana DA, Bhotika R. Automated liver lesion characterization using fast kVp switching dual energy computed tomography imaging. Proceedings of SPIE. 2010 Mar; 7624.
  27. Pavlicek W, Panse P, Hara A, Boltz T, Paden R, Yamak D, Licato P, Chandra N, Okerlund D, Dutta S, Bhotika R, Langan D. Initial use of fast switched dual energy CT for coronary artery disease. Proceedings of SPIE. 2010 Mar.
  28. Silva AC, Lawder HJ, Hara A, Kujak J, Pavlicek W. Innovations in CT dose reduction strategy: application of the adaptive statistical iterative reconstruction algorithm. AJR Am J Roentgenol. 2010 Jan; 194(1):191-9.
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  29. Gurudu SR, Leighton JA, Dionisio PM, Leontiadis GI, Fleischer DE, Hara AK, Heigh RI, Shiff AD, Sharma VK. Response to Doherty, Moss, and Cheifetz. Am J Gastroenterol. 2010; 105(9):2111-2.
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  30. Pasha SF, Hara AK, Leighton JA. Diagnostic evaluation and management of obscure gastrointestinal bleeding: a changing paradigm. Gastroenterol Hepatol (N Y). 2009 Dec; 5(12):839-50.
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  31. Hara AK, Walker FB, Silva AC, Leighton JA. Preliminary estimate of triphasic CT enterography performance in hemodynamically stable patients with suspected gastrointestinal bleeding. AJR Am J Roentgenol. 2009 Nov; 193(5):1252-60.
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  32. Peterson CM, Anderson JS, Hara AK, Carenza JW, Menias CO. Volvulus of the gastrointestinal tract: appearances at multimodality imaging. Radiographics. 2009 Sep-Oct; 29(5):1281-93.
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  33. Hara AK, Paden RG, Silva AC, Kujak JL, Lawder HJ, Pavlicek W. Iterative reconstruction technique for reducing body radiation dose at CT: feasibility study. AJR Am J Roentgenol. 2009 Sep; 193(3):764-71.
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  34. Johnson KT, Hara AK, Johnson CD. Evaluation of colitis: usefulness of CT enterography technique. Emerg Radiol. 2009 Jul; 16(4):277-82. Epub 2009 Feb 13.
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  35. Hara AK, Swartz PG. CT enterography of Crohn's disease. Abdom Imaging. 2009 May-Jun; 34(3):289-95.
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  36. Silva AC, Evans JM, McCullough AE, Jatoi MA, Vargas HE, Hara AK. MR imaging of hypervascular liver masses: a review of current techniques. Radiographics. 2009 Mar-Apr; 29(2):385-402.
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  37. Johnson CD, Chen MH, Toledano AY, Heiken JP, Dachman A, Kuo MD, Menias CO, Siewert B, Cheema JI, Obregon RG, Fidler JL, Zimmerman P, Horton KM, Coakley K, Iyer RB, Hara AK, Halvorsen RA Jr, Casola G, Yee J, Herman BA, Burgart LJ, Limburg PJ. Accuracy of CT colonography for detection of large adenomas and cancers. N Engl J Med. 2008 Sep 18; 359(12):1207-17.
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  38. Hara AK, Alam S, Heigh RI, Gurudu SR, Hentz JG, Leighton JA. Using CT enterography to monitor Crohn's disease activity: a preliminary study. AJR Am J Roentgenol. 2008 Jun; 190(6):1512-6.
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  39. Sachdev MS, Leighton JA, Fleischer DE, Heigh RI, Hara AK, Post JA, Erickson PJ, Sharma VK. A prospective study of the utility of abdominal radiographs after capsule endoscopy for the diagnosis of capsule retention. Gastrointest Endosc. 2007 Nov; 66(5):894-900.
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  40. Silva AC, Beaty SD, Hara AK, Fletcher JG, Fidler JL, Menias CO, Johnson CD. Spectrum of normal and abnormal CT appearances of the ileocecal valve and cecum with endoscopic and surgical correlation. Radiographics. 2007 Jul-Aug; 27(4):1039-54.
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  41. Paulsen SR, Huprich JE, Hara AK. CT enterography: noninvasive evaluation of Crohn's disease and obscure gastrointestinal bleed. Radiol Clin North Am. 2007 Mar; 45(2):303-15.
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  42. Summers RM, Huang A, Yao J, Campbell SR, Dempsey JE, Dwyer AJ, Franaszek M, Brickman DS, Bitter I, Petrick N, Hara AK. Assessment of polyp and mass histopathology by intravenous contrast-enhanced CT colonography. Acad Radiol. 2006 Dec; 13(12):1490-5.
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  43. Li J, Yao JH, Summers RM, Petrick N, Manry MT, Hara AK. An efficient feature selection algorithm for computer-aided polyp detection. International Journal on Artificial Intelligence Tools (Architectures, Languages, Algorithms) 2006 Dec; 15(6):893-915.
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  44. Silva AC, Wellnitz CV, Hara AK. Three-dimensional virtual dissection at CT colonography: unraveling the colon to search for lesions. Radiographics. 2006 Nov-Dec; 26(6):1669-86.
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  45. Silva AC, Vens EA, Hara AK, Fletcher JG, Fidler JL, Johnson CD. Evaluation of benign and malignant rectal lesions with CT colonography and endoscopic correlation. Radiographics. 2006 Jul-Aug; 26(4):1085-99.
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  46. Friese JL, Hara AK. AJR Teaching File: chronic nausea and vomiting with abdominal pain. AJR Am J Roentgenol. 2006 Jun; 186(6 Suppl 1):S445-8.
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  47. Triester SL, Leighton JA, Leontiadis GI, Gurudu SR, Fleischer DE, Hara AK, Heigh RI, Shiff AD, Sharma VK. A meta-analysis of the yield of capsule endoscopy compared to other diagnostic modalities in patients with non-stricturing small bowel Crohn's disease. Am J Gastroenterol. 2006 May; 101(5):954-64.
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  48. Hara AK, Leighton JA, Heigh RI, Sharma VK, Silva AC, De Petris G, Hentz JG, Fleischer DE. Crohn disease of the small bowel: preliminary comparison among CT enterography, capsule endoscopy, small-bowel follow-through, and ileoscopy. Radiology. 2006 Jan; 238(1):128-34.
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  49. Triester SL, Hara AK, Young-Fadok TM, Heigh RI. Colonic perforation after computed tomographic colonography in a patient with fibrostenosing Crohn's disease. Am J Gastroenterol. 2006 Jan; 101(1):189-92.
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  50. Triester SL, Leighton JA, Leontiadis GI, Fleischer DE, Hara AK, Heigh RI, Shiff AD, Sharma VK. A meta-analysis of the yield of capsule endoscopy compared to other diagnostic modalities in patients with obscure gastrointestinal bleeding. Am J Gastroenterol. 2005 Nov; 100(11):2407-18.
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  51. Silva AC, Hara AK, Leighton JA, Heppell JP. CT colonography with intravenous contrast material: varied appearances of colorectal carcinoma. Radiographics. 2005 Sep-Oct; 25(5):1321-34.
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  52. Hara AK, Leighton JA, Sharma VK, Heigh RI, Fleischer DE. Imaging of small bowel disease: comparison of capsule endoscopy, standard endoscopy, barium examination, and CT. Radiographics. 2005 May-Jun; 25(3):697-711; discussion 711-8.
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  53. Hara AK. Capsule endoscopy: the end of the barium small bowel examination? Abdom Imaging. 2005 Mar-Apr; 30(2):179-83.
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  54. Hara AK. Extracolonic findings at CT colonography. Seminars in Ultrasound CT MRI. 2005 Feb; 26(1):24-7.
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  55. Silva AC, Friese JL, Hara AK, Liu PT. MR cholangiopancreatography: improved ductal distention with intravenous morphine administration. Radiographics. 2004 May-Jun; 24(3):677-87.
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  56. Hara AK, Leighton JA, Sharma VK, Fleischer DE. Small bowel: preliminary comparison of capsule endoscopy with barium study and CT. Radiology. 2004 Jan; 230(1):260-5. Epub 2003 Nov 14.
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  57. Johnson CD, Toledano AY, Herman BA, Dachman AH, McFarland EG, Barish MA, Brink JA, Ernst RD, Fletcher JG, Halvorsen RA Jr, Hara AK, Hopper KD, Koehler RE, Lu DS, Macari M, Maccarty RL, Miller FH, Morrin M, Paulson EK, Yee J, Zalis M, American College of Computerized tomographic colonography: performance evaluation in a retrospective multicenter setting. Gastroenterology. 2003 Sep; 125(3):688-95.
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  58. Fidler JL, Johnson CD, MacCarty RL, Welch TJ, Hara AK, Harmsen WS. Detection of flat lesions in the colon with CT colonography. Abdom Imaging. 2002 May-Jun; 27(3):292-300.
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  59. Summers RM, Hara AK, Luboldt W, Johnson CD. Computed tomographic and magnetic resonance colonography: summary of progress from 1995 to 2000. Curr Probl Diagn Radiol. 2001 Sep-Oct; 30(5):147-67.
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  60. Hara AK, Johnson CD, MacCarty RL, Welch TJ, McCollough CH, Harmsen WS. CT colonography: single- versus multi-detector row imaging. Radiology. 2001 May; 219(2):461-5.
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  61. Hara AK, Johnson CD, MacCarty RL, Welch TJ. Incidental extracolonic findings at CT colonography. Radiology. 2000 May; 215(2):353-7.
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  62. Fletcher JG, Johnson CD, MacCarty RL, Welch TJ, Reed JE, Hara AK. CT colonography: potential pitfalls and problem-solving techniques. AJR Am J Roentgenol. 1999 May; 172(5):1271-8.
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  63. Hara AK, Johnson CD, Reed JE, Ahlquist DA, Nelson H, MacCarty RL, Harmsen WS, Ilstrup DM. Detection of colorectal polyps with CT colography: initial assessment of sensitivity and specificity. Radiology. 1997 Oct; 205(1):59-65.
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  64. Hara AK, Johnson CD, Reed JE. Colorectal lesions: evaluation with CT colography. Radiographics. 1997 Sep-Oct; 17(5):1157-67; discussion 1167-8.
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  65. Johnson CD, Hara AK, Reed JE. Computed tomographic colonography (Virtual colonoscopy): a new method for detecting colorectal neoplasms. Endoscopy. 1997 Aug; 29(6):454-61.
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  66. Ahlquist DA, Hara AK, Johnson CD. Computed tomographic colography and virtual colonoscopy. Gastrointest Endosc Clin N Am. 1997 Jul; 7(3):439-52.
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  67. Hara AK, Johnson CD, Reed JE, Ahlquist DA, Nelson H, Ehman RL, Harmsen WS. Reducing data size and radiation dose for CT colonography. AJR Am J Roentgenol. 1997 May; 168(5):1181-4.
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  68. Hara AK, Johnson CD, Reed JE, Ehman RL, Ilstrup DM. Colorectal polyp detection with CT colography: two- versus three-dimensional techniques. Work in progress. Radiology. 1996 Jul; 200(1):49-54.
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  69. Hara AK, Burkart DJ, Johnson CD, Felmlee JP, Ehman RL, Ilstrup DM, Harmsen WS. Variability of consecutive in vivo MR flow measurements in the main portal vein. AJR Am J Roentgenol. 1996 Jun; 166(6):1311-5.
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  70. Hara AK, Burkart DJ, Johnson CD, Ehman RL, Ilstrup DM. Abdominal phase-contrast MR angiography: breath-hold versus non-breath-hold techniques. J Magn Reson Imaging. 1996 Jan-Feb; 6(1):94-8.
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  71. Hara AK, Johnson CD, Reed JE, Ahlquist DA, Nelson H, Ehman RL, McCollough CH, Ilstrup DM. Detection of colorectal polyps by computed tomographic colography: feasibility of a novel technique. Gastroenterology. 1996 Jan; 110(1):284-90.
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  72. Reed JE, Hara AK, Johnson CD. CT colography combines virtual colonoscopy and transluminal cross sections. Computer Assisted Radiology Proceedings of the International Symposium on Computer and Communication Systems for Image Guided Diagnosis and Therapy Excerpta Medica Internation Congress Series. 1996; 1124:171-6.