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Kikano EG, Matalon SA, Eskian M, Lee L, Melnitchouk N, Bleday R, Khorasani R. Concordance of MRI With Pathology for Primary Staging of Rectal Cancer in Routine Clinical Practice: A Single Institution Experience. Curr Probl Diagn Radiol 2024; 53:68-72. [PMID: 37704486 DOI: 10.1067/j.cpradiol.2023.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 07/01/2023] [Accepted: 08/23/2023] [Indexed: 09/15/2023]
Abstract
PURPOSE MRI is the preferred imaging modality for primary staging of rectal cancer, used to guide treatment. Patients identified with clinical stage I disease receive upfront surgical resection; those with clinical stage II or greater undergo upfront neoadjuvant therapy. Although clinical under-/over-staging may have consequences for patients and presents opportunities for organ preservation, the correlation between clinical and pathologic staging in routine clinical practice within a single institute has not been fully established. METHODS This retrospective, Institutional Review Board-approved study, conducted at a National Cancer Institute-Designated Comprehensive Cancer Center with a multi-disciplinary rectal cancer disease center, included patients undergoing rectal MRI for primary staging January 1, 2018-August 30, 2020. Data collection included patient demographics, initial clinical stage via MRI report, pathologic diagnosis, pathologic stage, and treatment. The primary outcome was concordance of overall clinical and pathologic staging. Secondary outcomes included reasons for mismatched staging. RESULTS A total 105 rectal adenocarcinoma patients (64 males, mean age 57 ± 12.7 years) had staging MRI followed by surgical resection. A total of 28 patients (27%) had mismatched under-/over- staging. Ten patients (10%) were understaged with mismatched T stage group (clinical stage I, pathologic stage II), five (5%) were understaged with mismatched N stage group (clinical stage I, pathologic stage III), and 13 (12%) were overstaged (clinical stage II-III, pathologic stage 0-I). Treatment matched concordance between clinical and pathologic stages was 86%. CONCLUSION MRI for primary rectal cancer staging has high concordance with pathology. Future studies to assess strategies for reducing clinically relevant understaging would be beneficial.
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Affiliation(s)
- Elias G Kikano
- Center for Evidence-Based Imaging, Department of Radiology, Brigham and Women's Hospital, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA.
| | - Shanna A Matalon
- Center for Evidence-Based Imaging, Department of Radiology, Brigham and Women's Hospital, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA
| | - Mahsa Eskian
- Center for Evidence-Based Imaging, Department of Radiology, Brigham and Women's Hospital, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA
| | - Leslie Lee
- Center for Evidence-Based Imaging, Department of Radiology, Brigham and Women's Hospital, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA
| | | | - Ron Bleday
- Department of Surgery, Brigham and Women's Hospital, Boston, MA
| | - Ramin Khorasani
- Center for Evidence-Based Imaging, Department of Radiology, Brigham and Women's Hospital, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA
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Spierling A, Smith DA, Kikano EG, Rao S, Vos D, Tirumani SH, Ramaiya NH. Chest CT Findings in Patients with HIV Presenting to the Emergency Department: A Single Institute Experience. Curr Probl Diagn Radiol 2023; 52:110-116. [PMID: 36333220 DOI: 10.1067/j.cpradiol.2022.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 09/12/2022] [Accepted: 09/21/2022] [Indexed: 02/05/2023]
Abstract
PURPOSE The aim of this study was to analyze chest CT imaging findings and relevant clinical factors in patients with HIV presenting to the emergency department (ED). MATERIALS AND METHODS A retrospective review was performed to identify patients with HIV who received chest CT imaging evaluation in the acute ED setting. Analyzed patients included adults with a known diagnosis of HIV who presented to the ED at a single tertiary care center between 2004 and 2020 and received chest CT imaging. Chest CT findings were assessed by 2 radiologist readers, and relevant clinical data were gathered. Statistical analysis was performed to determine if imaging and clinical factors demonstrate significant associations with CD4 count, viral load, and antiretroviral therapy status. RESULTS A total of 113 patients with HIV were identified who presented to the ED and underwent chest CT imaging evaluation (mean age 47 ± 11 years). Frequently detected chest CT findings included infectious pneumonia (24%), malignancy (11%), pleural effusion (17%), pericardial effusion (13%), and pulmonary embolism (4%). CD4 count, viral load, and active retroviral therapy demonstrated statistically significant associations with a number of key imaging and clinical factors, including presence of pneumonia, malignancy, average length of hospital admission, and survival. CONCLUSION Patients with HIV present with a wide range of imaging findings when presenting in the acute ED setting. CD4 count, viral load, and active retroviral therapy status demonstrate statistically significant associations with multiple key imaging findings and clinical factors. Chest CT plays an integral role in the clinical management of this unique patient population.
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Affiliation(s)
- Angela Spierling
- Case Western Reserve University School of Medicine, Cleveland, OH
| | - Daniel A Smith
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, OH.
| | - Elias G Kikano
- Department of Radiology, Brigham and Women's Hospital, Boston, MA
| | - Sanjay Rao
- Case Western Reserve University School of Medicine, Cleveland, OH
| | - Derek Vos
- Case Western Reserve University School of Medicine, Cleveland, OH
| | - Sree H Tirumani
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, OH
| | - Nikhil H Ramaiya
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, OH
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Vos D, Ramaiya S, Spierling A, Anderson W, Kikano EG, Tirumani SH, Smith DA. Abdominopelvic CT Imaging Findings in the Emergency Department in Patients with HIV Positive Status: Single Institute Experience. Curr Probl Diagn Radiol 2022; 52:257-262. [PMID: 36481296 DOI: 10.1067/j.cpradiol.2022.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To assess emergency department (ED) abdominopelvic computed tomography (CT) imaging utilization and findings in patients with known human immunodeficiency virus (HIV) positive status. MATERIALS AND METHODS A retrospective chart review of imaging, clinical, and laboratory data was performed for HIV positive patients who demonstrated HIV-related findings on abdominopelvic CT imaging performed within the ED. RESULTS One hundred and eighty-eight patients with 522 CT scans of the abdomen and/or pelvis were reviewed. 47 patients with HIV presenting to the ED on 82 separate occasions were included in this study (mean age 43.3 years). Patients presented to the ED with infectious/inflammatory disease (n = 54) or history of HIV-related malignancy or new/worsening HIV-related malignancy (n = 28). The most common findings on abdominopelvic CT were anorectal pathology including anorectal abscess or proctitis (n = 22), followed by colitis (n = 19). Findings of HIV-associated malignancy were less common, including anal/rectal cancer (n = 7), Kaposi's sarcoma (n = 4), and lymphoma (n = 2). At the time of ED visit, 25.6% (n = 21) of patients had acquired immunodeficiency syndrome (AIDS). Higher WBC counts were found in the infectious/inflammatory group (P = 0.021) and patients without AIDS (P = 0.0159), while lower WBC counts were associated with new or worsening malignancy (P = 0.007) and AIDS (P = 0.0000). Patients with AIDS were more likely to be deceased at the time of our study. CONCLUSIONS The majority of ED visits within our population were attributed to infectious/inflammatory etiologies. CT findings demonstrated predominantly infectious/inflammatory processes, with anorectal pathology being the most common. Findings of malignancy on CT were less common, while opportunistic infections and AIDS-defining malignancies were uncommon.
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Chen M, Smith DA, Yoon JG, Vos D, Kikano EG, Tirumani SH, Ramaiya NH. A Decade of Success in Melanoma Immunotherapy and Targeted Therapy: What Every Radiologist Should Know. J Comput Assist Tomogr 2022; 46:621-632. [PMID: 35675685 DOI: 10.1097/rct.0000000000001315] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT Treatment strategies for malignant melanoma have rapidly evolved over the past decade. Because of its propensity to develop advanced stage and metastatic disease, melanoma has contributed to the majority of mortalities among patients with skin cancer. The development of novel therapeutics such as immunotherapy and targeted molecular therapies has revolutionized the treatment of patients with advanced stage and metastatic malignant melanoma. Immune checkpoint inhibitors, BRAF/MEK inhibitors, and other revolutionary therapies have demonstrated remarkable success in the treatment of this common malignancy. Along with these advancements in systemic therapies, imaging has continued to play a critical role in the diagnosis and follow-up of patients with malignant melanoma. As the use of these novel therapies continues to expand, knowledge of the evolving therapeutic landscape of melanoma is becoming critical for radiologists. In this review, we provide a primer for radiologists outlining the evolution of immunotherapy and targeted therapy in the treatment of melanoma. We discuss the critical role of imaging in evaluation of treatment response, including a summary of current imaging response guidelines. Last, we summarize the essential role of imaging in the evaluation of potential adverse events seen in patients with malignant melanoma undergoing treatment with immune checkpoint inhibitors.
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Affiliation(s)
- Mark Chen
- From the Case Western Reserve University School of Medicine
| | - Daniel A Smith
- Department of Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH
| | - Justin G Yoon
- From the Case Western Reserve University School of Medicine
| | - Derek Vos
- From the Case Western Reserve University School of Medicine
| | - Elias G Kikano
- Department of Radiology, Brigham & Women's Hospital, Boston, MA
| | - Sree Harsha Tirumani
- Department of Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH
| | - Nikhil H Ramaiya
- Department of Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH
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Affiliation(s)
- Elias G Kikano
- From the Department of Radiology, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115 (E.G.K.); and Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, Ohio (N.H.R.)
| | - Nikhil H Ramaiya
- From the Department of Radiology, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115 (E.G.K.); and Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, Cleveland, Ohio (N.H.R.)
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Rao S, Smith DA, Guler E, Kikano EG, Rajdev MA, Yoest JM, Ramaiya NH, Tirumani SH. Past, Present, and Future of Serum Tumor Markers in Management of Ovarian Cancer: A Guide for the Radiologist. Radiographics 2021; 41:1839-1856. [PMID: 34597221 DOI: 10.1148/rg.2021210005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The ability to accurately detect early ovarian cancer and subsequently monitor treatment response is essential to improving survival for patients with ovarian malignancies. Several serum tumor markers (STMs)-including cancer antigen 125 (CA-125), human epididymis protein 4 (HE4), cancer antigen 19-9 (CA 19-9), and carcinoembryonic antigen (CEA)-have been used as a noninvasive method of identifying ovarian cancer in conjunction with imaging. Although current guidelines do not recommend use of STMs as screening tools for ovarian cancer, these markers have clinical utility in both diagnosis and surveillance for women with ovarian cancer. CA-125 is the most commonly used STM; its level may be elevated in several types of ovarian cancer, including epithelial cell tumors, carcinosarcoma, teratomas, and secondary ovarian malignancies. An elevated level of CA 19-9 is associated with clear cell tumors, teratomas, and secondary malignancies. CEA is most commonly associated with mucinous ovarian cancers. Finally, HE4 is being increasingly used to identify certain subtypes of epithelial ovarian cancers, particularly serous and endometrioid tumors. Diagnosis of ovarian cancers relies on a combination of CA-125 levels and US findings, which include a large adnexal mass or high-risk features, including septa and increased vascularity. CT is preferred for staging and is used along with PET and STM monitoring for surveillance. Increasingly, MRI is being used to characterize ovarian lesions that are indeterminate at US or CT. The future of STM testing involves development of "liquid biopsies," in which plasma samples are analyzed for evidence of tumors, including circulating tumor DNA or tumor cells and tumor micro-RNA. When combined with traditional imaging techniques, liquid biopsies may lead to earlier diagnosis and improved survival. An invited commentary by Shinagare is available online. ©RSNA, 2021.
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Affiliation(s)
- Sanjay Rao
- From the Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, B114, Cleveland, OH 44106-4915 (S.R., D.A.S., E.G., E.G.K., M.A.R., N.H.R., S.H.T.); and Department of Pathology, Case Western Reserve University, Cleveland, Ohio (J.M.Y.)
| | - Daniel A Smith
- From the Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, B114, Cleveland, OH 44106-4915 (S.R., D.A.S., E.G., E.G.K., M.A.R., N.H.R., S.H.T.); and Department of Pathology, Case Western Reserve University, Cleveland, Ohio (J.M.Y.)
| | - Ezgi Guler
- From the Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, B114, Cleveland, OH 44106-4915 (S.R., D.A.S., E.G., E.G.K., M.A.R., N.H.R., S.H.T.); and Department of Pathology, Case Western Reserve University, Cleveland, Ohio (J.M.Y.)
| | - Elias G Kikano
- From the Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, B114, Cleveland, OH 44106-4915 (S.R., D.A.S., E.G., E.G.K., M.A.R., N.H.R., S.H.T.); and Department of Pathology, Case Western Reserve University, Cleveland, Ohio (J.M.Y.)
| | - Maharshi A Rajdev
- From the Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, B114, Cleveland, OH 44106-4915 (S.R., D.A.S., E.G., E.G.K., M.A.R., N.H.R., S.H.T.); and Department of Pathology, Case Western Reserve University, Cleveland, Ohio (J.M.Y.)
| | - Jennifer M Yoest
- From the Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, B114, Cleveland, OH 44106-4915 (S.R., D.A.S., E.G., E.G.K., M.A.R., N.H.R., S.H.T.); and Department of Pathology, Case Western Reserve University, Cleveland, Ohio (J.M.Y.)
| | - Nikhil H Ramaiya
- From the Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, B114, Cleveland, OH 44106-4915 (S.R., D.A.S., E.G., E.G.K., M.A.R., N.H.R., S.H.T.); and Department of Pathology, Case Western Reserve University, Cleveland, Ohio (J.M.Y.)
| | - Sree Harsha Tirumani
- From the Department of Radiology, University Hospitals Cleveland Medical Center, Case Western Reserve University, 11100 Euclid Ave, B114, Cleveland, OH 44106-4915 (S.R., D.A.S., E.G., E.G.K., M.A.R., N.H.R., S.H.T.); and Department of Pathology, Case Western Reserve University, Cleveland, Ohio (J.M.Y.)
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Spierling A, Kikano EG, Chagarlamudi K, Vos D, Rao S, Smith DA, Ramaiya NH. Imaging features of hypercalcemia: A primer for emergency radiologists. Clin Imaging 2021; 80:215-224. [PMID: 34352494 DOI: 10.1016/j.clinimag.2021.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/27/2021] [Accepted: 07/20/2021] [Indexed: 10/20/2022]
Abstract
Hypercalcemia is a marker for a wide variety of underlying etiologies, and its presentation in the emergency setting may be asymptomatic, incidental, or a primary complaint with associated symptoms and physical exam findings. While the workup is initially driven through serum laboratory testing, imaging plays an important role in diagnosis and post-treatment follow up. This review covers multiple common and uncommon etiologies of hypercalcemia, details their underlying mechanisms, and identifies the most important associated imaging findings. It is important for radiologists to be familiar with these etiologies and imaging findings, particularly in the emergency setting since hypercalcemia may represent the only significant laboratory abnormality associated with the presenting condition. Furthermore, the radiologist's interpretation of a study may be directly influenced by knowing about a patient's hypercalcemia.
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Affiliation(s)
- Angela Spierling
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA.
| | - Elias G Kikano
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA.
| | - Kaushik Chagarlamudi
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA.
| | - Derek Vos
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA.
| | - Sanjay Rao
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA.
| | - Daniel A Smith
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA.
| | - Nikhil H Ramaiya
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA.
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Martin S, Pierce J, Kikano EG, Vos D, Tirumani SH, Ramaiya N. Considerations in imaging interpretations for colitis in critically ill patients during the COVID-19 era. Emerg Radiol 2021; 28:699-704. [PMID: 33728564 PMCID: PMC7963684 DOI: 10.1007/s10140-021-01925-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 03/08/2021] [Indexed: 01/02/2023]
Abstract
OBJECTIVE The study aims to demonstrate risk factors for colitis in intensive care unit patients with and without coronavirus disease 2019 (COVID-19). METHODS Retrospective review was performed to identify intensive care unit (ICU) patients with the diagnosis of COVID-19 with computed tomography (CT) between March 20 and December 31, 2020. ICU patients without COVID-19 diagnosis with CT between March 20 and May 10, 2020 were also identified. CT image findings of colitis or terminal ileitis as well as supportive treatment including ventilator, vasopressors, or extracorporeal membrane oxygenation (ECMO) were recorded. Statistical analysis was performed to determine if clinical factors differed in patients with and without positive CT finding. RESULTS Total 61 ICU patients were selected, including 32 (52%) COVID-19-positive patients and 29 (48%) non-COVID-19 patients. CT findings of colitis or terminal ileitis were identified in 27 patients (44%). Seventy-four percent of the patients with positive CT findings (20/27) received supportive therapies prior to CT, while 56% of the patients without abnormal CT findings (19/34) received supportive therapies. Vasopressor treatment was significantly associated with development of colitis and/or terminal ileitis (p = 0.04) and COVID-19 status was not significantly different between these groups (p = 0.07). CONCLUSIONS In our study, there was significant correlation between prior vasopressor therapy and imaging findings of colitis or terminal ileitis in ICU patients, independent of COVID-19 status. Our observation raises a possibility that the reported COVID-19-related severe gastrointestinal complications and potential poor outcome could have been confounded by underlying severe critically ill status, and warrants a caution in diagnosis of gastrointestinal complication.
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Affiliation(s)
- Sooyoung Martin
- Department of Radiology, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA.
| | - Jonathan Pierce
- Department of Radiology, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Elias G Kikano
- Department of Radiology, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Derek Vos
- Department of Radiology, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Sree Harsha Tirumani
- Department of Radiology, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Nikhil Ramaiya
- Department of Radiology, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44106, USA
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Gupta A, Kikano EG, Bera K, Baruah D, Saboo SS, Lennartz S, Hokamp NG, Gholamrezanezhad A, Gilkeson RC, Laukamp KR. Dual energy imaging in cardiothoracic pathologies: A primer for radiologists and clinicians. Eur J Radiol Open 2021; 8:100324. [PMID: 33532519 PMCID: PMC7822965 DOI: 10.1016/j.ejro.2021.100324] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/05/2021] [Accepted: 01/06/2021] [Indexed: 12/12/2022] Open
Abstract
Recent advances in dual-energy imaging techniques, dual-energy subtraction radiography (DESR) and dual-energy CT (DECT), offer new and useful additional information to conventional imaging, thus improving assessment of cardiothoracic abnormalities. DESR facilitates detection and characterization of pulmonary nodules. Other advantages of DESR include better depiction of pleural, lung parenchymal, airway and chest wall abnormalities, detection of foreign bodies and indwelling devices, improved visualization of cardiac and coronary artery calcifications helping in risk stratification of coronary artery disease, and diagnosing conditions like constrictive pericarditis and valvular stenosis. Commercially available DECT approaches are classified into emission based (dual rotation/spin, dual source, rapid kilovoltage switching and split beam) and detector-based (dual layer) systems. DECT provide several specialized image reconstructions. Virtual non-contrast images (VNC) allow for radiation dose reduction by obviating need for true non contrast images, low energy virtual mono-energetic images (VMI) boost contrast enhancement and help in salvaging otherwise non-diagnostic vascular studies, high energy VMI reduce beam hardening artifacts from metallic hardware or dense contrast material, and iodine density images allow quantitative and qualitative assessment of enhancement/iodine distribution. The large amount of data generated by DECT can affect interpreting physician efficiency but also limit clinical adoption of the technology. Optimization of the existing workflow and streamlining the integration between post-processing software and picture archiving and communication system (PACS) is therefore warranted.
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Key Words
- AI, artificial intelligence
- BT, blalock-taussig
- CAD, computer-aided detection
- CR, computed radiography
- DECT, dual-energy computed tomography
- DESR, dual-energy subtraction radiography
- Dual energy CT
- Dual energy radiography
- NIH, national institute of health
- NPV, negative predictive value
- PACS, picture archiving and communication system
- PCD, photon-counting detector
- PET, positron emission tomography
- PPV, positive predictive value
- Photoelectric effect
- SNR, signal to noise ratio
- SPECT, single photon emission computed tomography
- SVC, superior vena cava
- TAVI, transcatheter aortic valve implantation
- TNC, true non contrast
- VMI, virtual mono-energetic images
- VNC, virtual non-contrast images
- eGFR, estimated glomerular filtration rate
- kV, kilo volt
- keV, kilo electron volt
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Affiliation(s)
- Amit Gupta
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Elias G Kikano
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Kaustav Bera
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Dhiraj Baruah
- Department of Radiology, Medical University of South Carolina, Charleston, SC, USA
| | - Sachin S Saboo
- Department of Radiology, University Of Texas Health Science Center, San Antonio, TX, USA
| | - Simon Lennartz
- Institute for Diagnostic and Interventional Radiology, University Hospital Cologne, Cologne, Germany
| | - Nils Große Hokamp
- Institute for Diagnostic and Interventional Radiology, University Hospital Cologne, Cologne, Germany
| | - Ali Gholamrezanezhad
- Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Robert C Gilkeson
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Kai R Laukamp
- Institute for Diagnostic and Interventional Radiology, University Hospital Cologne, Cologne, Germany
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Shah NR, Pierce JD, Kikano EG, Rahnemai-Azar AA, Gilkeson RC, Gupta A. CT Coronary Angiography Fractional Flow Reserve: New Advances in the Diagnosis and Treatment of Coronary Artery Disease. Curr Probl Diagn Radiol 2020; 50:925-936. [PMID: 33041159 DOI: 10.1067/j.cpradiol.2020.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 11/22/2022]
Abstract
Coronary artery disease (CAD) remains the most common cardiovascular disease, accounting for 6% of all Emergency Department visits and 27% of all Emergency Department hospitalizations.1 Invasive coronary angiography with fractional flow reserve (FFR) remains the gold standard to assess for hemodynamically stenosis in CAD patients. However, for low- and intermediate-risk patients, noninvasive modalities have started to gain favor as patients with stable CAD who received optimal medical therapy did as well as patients who underwent percutaneous coronary intervention.2 This led to the incorporation of FFRCT. cCTA provides good spatial resolution for evaluating stenosis. FFR provides additional information regarding whether the stenosis is hemodynamically significant. FFR is the ratio of maximum blood flow in a stenotic artery to the maximum blood flow through that artery without stenosis.3 Computational fluid dynamics involved in FFRCT is based on Navier-Stokes equations, allowing the assessment of pressure and flow across coronary arteries. Limitations do exist with FFRCT which includes false-positive results due to step artifact and left ventricular hypertrophy, as well as manual segmentation and ostial stenosis, which can cause false-negative results. However, there are improvements on the horizon including artificial intelligence-driven computation of FFR and the utilization of virtual stenting for surgical planning. The purpose of this review is to describe the clinical validation, underlying mechanism, and implementation of FFRCT.
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Affiliation(s)
- Neal R Shah
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, Cleveland, OH.
| | - Jonathan D Pierce
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, Cleveland, OH
| | - Elias G Kikano
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, Cleveland, OH
| | - Amir Ata Rahnemai-Azar
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, Cleveland, OH
| | - Robert C Gilkeson
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, Cleveland, OH
| | - Amit Gupta
- University Hospitals Cleveland Medical Center/Case Western Reserve University, Department of Radiology, Cleveland, OH
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Pfau D, Guler E, Smith DA, Matsunaga F, Kikano EG, Tirumani SH, Dowlati A, Ramaiya NH. Imaging features of gastrointestinal toxicity in non-small cell lung cancer patients treated with erlotinib: A single institute 13-year experience. Clin Imaging 2020; 68:210-217. [PMID: 32892106 DOI: 10.1016/j.clinimag.2020.08.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/13/2020] [Accepted: 08/24/2020] [Indexed: 11/17/2022]
Abstract
OBJECTIVES To investigate the imaging features of erlotinib-associated gastrointestinal toxicity (GT) in patients with non-small cell lung cancer (NSCLC). MATERIALS AND METHODS The electronic medical records of 157 patients with NSCLC who received erlotinib between 2005 and 2018 were retrospectively reviewed to identify patients with GT. Clinical and radiologic evidence of erlotinib-associated GT was evaluated. Imaging findings were cross-referenced with clinical presentation, management, and outcomes. RESULTS 24 (15%) patients (16 women; median age, 68 years) with radiologic evidence of GT were identified. The median time to detection of GT on imaging was 4.5 months (range: 0-58 months). 3/24 (12.5%) patients had no clinical symptoms, but GT was radiologically identified. Erlotinib-associated GT manifested in the large bowel in either a diffuse (42%) or segmental (58%) pattern. The most common imaging finding was fluid-filled bowel (23/24, 96%). CONCLUSION Erlotinib-associated GT was identified in 15% patients with NSCLC. Fluid-filled colon and segmental involvement were the most common imaging manifestations.
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Affiliation(s)
- David Pfau
- University Hospitals Cleveland Medical Center, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA
| | - Ezgi Guler
- University Hospitals Cleveland Medical Center, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA.
| | - Daniel A Smith
- University Hospitals Cleveland Medical Center, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA
| | - Felipe Matsunaga
- University Hospitals Cleveland Medical Center, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA
| | - Elias G Kikano
- University Hospitals Cleveland Medical Center, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA
| | - Sree Harsha Tirumani
- University Hospitals Cleveland Medical Center, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA
| | - Afshin Dowlati
- University Hospitals Cleveland Medical Center, Department of Hematology and Oncology, 11100 Euclid Ave, Cleveland, OH 44106, USA
| | - Nikhil H Ramaiya
- University Hospitals Cleveland Medical Center, Department of Radiology, 11100 Euclid Ave, Cleveland, OH 44106, USA
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Parikh KD, Ramaiya NH, Kikano EG, Tirumani SH, Pierce J, Butcher C, Sunshine JL, Plecha DM. Quantifying the decrease in emergency department imaging utilization during the COVID-19 pandemic at a multicenter healthcare system in Ohio. Emerg Radiol 2020; 27:765-772. [PMID: 32870462 PMCID: PMC7459244 DOI: 10.1007/s10140-020-01848-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/25/2020] [Indexed: 11/30/2022]
Abstract
Purpose To illustrate the change in emergency department (ED) imaging utilization at a multicenter health system in the state of Ohio during the COVID-19 pandemic. Methods A retrospective observational study was conducted assessing ED imaging volumes between March 1, 2020, and May 11, 2020, during the COVID-19 crisis. A rolling 7-day total value was used for volume tracking and comparison. Total imaging utilization in the ED was compared with new COVID-19 cases in our region. Utilization was first categorized by modality and then by plain films and computed tomography (CT) scans grouped by body part. CT imaging of the chest was specifically investigated by assessing both CT chest only exams and CT chest, abdomen, and pelvis (C/A/P) exams. Ultimately, matching pair-wise statistical analysis of exam volumes was performed to assess significance of volume change. Results Our multicenter health system experienced a 46% drop in imaging utilization (p < 0.0001) during the pandemic. Matching pair-wise analysis showed a statistically significant volume decrease by each modality and body part. The exceptions were non-contrast chest CT, which increased (p = 0.0053), and non-trauma C/A/P CT, which did not show a statistically significant volume change (p = 0.0633). Conclusion ED imaging utilization trends revealed through actual health system data will help inform evidence-based decisions for more accurate volume predictions and therefore institutional preparedness for current and future pandemics.
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Affiliation(s)
- Keval D Parikh
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Nikhil H Ramaiya
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Elias G Kikano
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA.
| | - Sree Harsha Tirumani
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Jonathan Pierce
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Carl Butcher
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Jeffrey L Sunshine
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
| | - Donna M Plecha
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH, 44106, USA
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Parikh KD, Ramaiya NH, Kikano EG, Tirumani SH, Pandya H, Stovicek B, Sunshine JL, Plecha DM. COVID-19 Pandemic Impact on Decreased Imaging Utilization: A Single Institutional Experience. Acad Radiol 2020; 27:1204-1213. [PMID: 32665091 PMCID: PMC7340053 DOI: 10.1016/j.acra.2020.06.024] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/25/2020] [Accepted: 06/29/2020] [Indexed: 11/17/2022]
Abstract
RATIONALE AND OBJECTIVES Predictive models and anecdotal articles suggest radiology practices were losing 50%-70% of their normal imaging volume during the COVID-19 pandemic. Using actual institutional data, we investigated the change in imaging utilization and revenue during this public health crisis. MATERIALS AND METHODS Imaging performed within the 8-week span between March 8 and April 30, 2020 was categorized into the COVID-19 healthcare crisis timeframe. The first week of this date range and the 10 weeks prior were used to derive the normal practice expected volume. A rolling 7-day total value was used for volume tracking and comparison. Total imaging utilization was derived and organized by patient setting (outpatient, inpatient, emergency) and imaging modality (X-ray, CT, Mammography, MRI, Nuclear Medicine/PET, US). The three highest volume hospitals were analyzed. Revenue information was collected from the hospital billing system. RESULTS System-wide imaging volume decreased by 55% between April 7 and 13, 2020. Outpatient exams decreased by 68% relative to normal practice. Emergency exams decreased by 48% and inpatient exams declined by 31%. Mammograms and nuclear medicine scans were the most affected modalities, decreasing by 93% and 61%, respectively. The main campus hospital experienced less relative imaging volume loss compared to the other smaller and outpatient-driven hospitals. At its lowest point, the technical component revenue from main campus imaging services demonstrated a 49% negative variance from normal practice. CONCLUSION The trends and magnitude of the actual imaging utilization data presented will help inform evidence-based decisions for more accurate volume predictions, policy changes, and institutional preparedness for current and future pandemics.
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Affiliation(s)
- Keval D Parikh
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106.
| | - Nikhil H Ramaiya
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106
| | - Elias G Kikano
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106
| | - Sree Harsha Tirumani
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106
| | - Himanshu Pandya
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106
| | - Bart Stovicek
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106
| | - Jeffrey L Sunshine
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106
| | - Donna M Plecha
- Department of Radiology, University Hospitals Cleveland Medical Center/Case Western Reserve University, 11100 Euclid Ave, Cleveland, OH 44106
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Ansari-Gilani K, Gilkeson RC, Kikano EG, Hoit BD. Multimodality approach to the diagnosis and management of constrictive pericarditis. Echocardiography 2020; 37:632-636. [PMID: 32240548 DOI: 10.1111/echo.14649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 03/09/2020] [Accepted: 03/12/2020] [Indexed: 11/27/2022] Open
Abstract
Despite advances in cardiovascular imaging, the diagnosis of constrictive pericarditis remains challenging. A multimodality approach to the diagnosis of CP is essential to (a) fully assess the extent of pericardial thickening and calcification, (b) detect the functional and hemodynamic consequences of the constricting pericardium, and (c) implement the optimal management strategy in these often complex cases. This case-based review highlights the role and diagnostic ambiguities of multimodality imaging.
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Affiliation(s)
| | | | - Elias G Kikano
- University Hospital Cleveland Medical Center, Cleveland, Ohio
| | - Brian D Hoit
- Harrington Heart & Vascular Institute, University Hospital Cleveland Medical Center, Cleveland, Ohio
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