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  1. Article ; Online: "Corn-on-the-cob" sign.

    Ghabach, Marc / Davarpanah, Amir H

    Abdominal radiology (New York)

    2020  Volume 45, Issue 10, Page(s) 3373–3374

    MeSH term(s) Humans ; Zea mays
    Language English
    Publishing date 2020-02-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2839786-1
    ISSN 2366-0058 ; 2366-004X
    ISSN (online) 2366-0058
    ISSN 2366-004X
    DOI 10.1007/s00261-020-02446-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Hydrogen peroxide poisoning.

    Ghabach, Marc / Davarpanah, Amir H

    The lancet. Gastroenterology & hepatology

    2020  Volume 5, Issue 4, Page(s) 418

    MeSH term(s) Abdominal Pain/etiology ; Aftercare ; Depression/complications ; Depression/psychology ; Eating ; Emergency Service, Hospital ; Esophagus/diagnostic imaging ; Esophagus/pathology ; Humans ; Hydrogen Peroxide/poisoning ; Hyperbaric Oxygenation/methods ; Intensive Care Units ; Male ; Poisoning/diagnosis ; Poisoning/psychology ; Suicide, Attempted/psychology ; Tomography, X-Ray Computed/methods ; Treatment Outcome ; Vomiting/etiology ; Young Adult
    Chemical Substances Hydrogen Peroxide (BBX060AN9V)
    Language English
    Publishing date 2020-03-13
    Publishing country Netherlands
    Document type Case Reports ; Journal Article
    ISSN 2468-1253
    ISSN (online) 2468-1253
    DOI 10.1016/S2468-1253(20)30003-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Case 282.

    Davarpanah, Amir H / Eberhardt, Linton W

    Radiology

    2020  Volume 295, Issue 3, Page(s) 733–735

    Abstract: HistoryA 63-year-old woman with a history of left mastectomy for breast cancer and partial gastrectomy with Roux-en-Y reconstruction for nonhealing peptic ulcer presented to the emergency department and reported a 1-month history of abdominal distention, ...

    Abstract HistoryA 63-year-old woman with a history of left mastectomy for breast cancer and partial gastrectomy with Roux-en-Y reconstruction for nonhealing peptic ulcer presented to the emergency department and reported a 1-month history of abdominal distention, fevers, chills, and flu-like symptoms. She was initially suspected of having flu, and she completed a course of oseltamivir; however, she had continued fatigue, fever, chills, abdominal bloating, and loss of appetite. She reported no contact with a sick person or recent travel. At admission, laboratory studies revealed leukocytosis, with a white blood cell count of 15.1 × 10
    Language English
    Publishing date 2020-05-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80324-8
    ISSN 1527-1315 ; 0033-8419
    ISSN (online) 1527-1315
    ISSN 0033-8419
    DOI 10.1148/radiol.2020190435
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Case 282: Fishbone Pylephlebitis.

    Davarpanah, Amir H / Eberhardt, Linton W

    Radiology

    2020  Volume 297, Issue 1, Page(s) 239–243

    Abstract: HistoryA 63-year-old woman with a history of left mastectomy for breast cancer and partial gastrectomy with Roux-en-Y reconstruction for nonhealing peptic ulcer presented to the emergency department and reported a 1-month history of abdominal distention, ...

    Abstract HistoryA 63-year-old woman with a history of left mastectomy for breast cancer and partial gastrectomy with Roux-en-Y reconstruction for nonhealing peptic ulcer presented to the emergency department and reported a 1-month history of abdominal distention, fevers, chills, and flu-like symptoms. She was initially suspected of having flu, and she completed a course of oseltamivir; however, she had continued to experience fatigue, fever, chills, abdominal bloating, and loss of appetite. She reported no contact with a sick person or recent travel. At admission, laboratory studies revealed leukocytosis, with a white blood cell count of 15.1 × 103/μL (15.1 × 109/L) (normal range, 4.0-10.0 × 103/μL [4.0-10.0 × 109/L]), an elevated sedimentation rate of 100 mm per hour (normal range, 0-30 mm per hour), and a C-reactive protein level of 203.8 mg/L (1940.9 nmol/L) (normal range, ≤10 mg/L [≤95.2 nmol/L]). Liver enzyme levels were elevated, with an alanine aminotransferase level of 48 U/L (0.80 µkat/L) (normal range, 0-29 U/L [0-0.48 µkat/L]), an aspartate aminotransferase level of 98 U/L (1.6 µkat/L) (normal range, 10-37 U/L [0.16-0.62 µkat/L]), an alkaline phosphatase level of 682 U/L (11.4 μkat/L) (normal range, 65-195 U/L [1.1-3.3 μkat/L]), and a total bilirubin level of 1.5 mg/dL (25.7 µmol/L) (normal range, 0.3-1.0 mg/dL [5.1-17.1 μmol/L]). Abdominopelvic CT was performed.
    MeSH term(s) Abscess/diagnostic imaging ; Animals ; Bone and Bones/diagnostic imaging ; Contrast Media ; Diagnosis, Differential ; Female ; Fishes ; Foreign Bodies/diagnostic imaging ; Humans ; Iohexol ; Liver Diseases/diagnostic imaging ; Liver Function Tests ; Mesenteric Veins ; Middle Aged ; Portal Vein ; Tomography, X-Ray Computed ; Venous Thrombosis/diagnostic imaging
    Chemical Substances Contrast Media ; Iohexol (4419T9MX03)
    Language English
    Publishing date 2020-09-21
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 80324-8
    ISSN 1527-1315 ; 0033-8419
    ISSN (online) 1527-1315
    ISSN 0033-8419
    DOI 10.1148/radiol.2020190436
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  5. Article: Imaging of intestinal vasculitis focusing on MR and CT enterography: a two-way street between radiologic findings and clinical data.

    Amouei, Mehrnam / Momtazmanesh, Sara / Kavosi, Hoda / Davarpanah, Amir H / Shirkhoda, Ali / Radmard, Amir Reza

    Insights into imaging

    2022  Volume 13, Issue 1, Page(s) 143

    Abstract: Diagnosis of intestinal vasculitis is often challenging due to the non-specific clinical and imaging findings. Vasculitides with gastrointestinal (GI) manifestations are rare, but their diagnosis holds immense significance as late or missed recognition ... ...

    Abstract Diagnosis of intestinal vasculitis is often challenging due to the non-specific clinical and imaging findings. Vasculitides with gastrointestinal (GI) manifestations are rare, but their diagnosis holds immense significance as late or missed recognition can result in high mortality rates. Given the resemblance of radiologic findings with some other entities, GI vasculitis is often overlooked on small bowel studies done using computed tomography/magnetic resonance enterography (CTE/MRE). Hereon, we reviewed radiologic findings of vasculitis with gastrointestinal involvement on CTE and MRE. The variety of findings on MRE/CTE depend upon the size of the involved vessels. Signs of intestinal ischemia, e.g., mural thickening, submucosal edema, mural hyperenhancement, and restricted diffusion on diffusion-weighted imaging, are common in intestinal vasculitis. Involvement of the abdominal aorta and the major visceral arteries is presented as concentric mural thickening, transmural calcification, luminal stenosis, occlusion, aneurysmal changes, and collateral vessels. Such findings can be observed particularly in large- and medium-vessel vasculitis. The presence of extra-intestinal findings, including within the liver, kidneys, or spleen in the form of focal areas of infarction or heterogeneous enhancement due to microvascular involvement, can be another radiologic clue in diagnosis of vasculitis. The link between the clinical/laboratory findings and MRE/CTE abnormalities needs to be corresponded when it comes to the diagnosis of intestinal vasculitis.
    Language English
    Publishing date 2022-09-04
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 2543323-4
    ISSN 1869-4101
    ISSN 1869-4101
    DOI 10.1186/s13244-022-01284-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: MR Enterography in Ulcerative Colitis: Beyond Endoscopy.

    Radmard, Amir Reza / Amouei, Mehrnam / Torabi, Ala / Sima, Ali Reza / Saffar, Hiva / Geahchan, Amine / Davarpanah, Amir H / Taouli, Bachir

    Radiographics : a review publication of the Radiological Society of North America, Inc

    2023  Volume 44, Issue 1, Page(s) e230131

    Abstract: Ulcerative colitis (UC) is a chronic idiopathic inflammatory bowel disease (IBD) that progressively affects mucosa and submuccosa of the colon and rectum in a continual pattern. In comparison, Crohn disease (CD), the other type of IBD, is a chronic ... ...

    Abstract Ulcerative colitis (UC) is a chronic idiopathic inflammatory bowel disease (IBD) that progressively affects mucosa and submuccosa of the colon and rectum in a continual pattern. In comparison, Crohn disease (CD), the other type of IBD, is a chronic transmural inflammatory disorder that can involve any part of the gastrointestinal tract. MR enterography (MRE) has emerged as an important imaging modality for the diagnosis and detection of disease activity and complications in CD, with comparable results to those of endoscopy. But MRE has been underused for assessment of UC in recent years, and clinicians heavily rely on endoscopic findings for management of UC. Despite UC being considered an endoscopically assessable disease, MRE can provide useful information beyond that obtained with endoscopy about mural or extramural abnormalities, inaccessible parts of the colonic lumen, associated extraintestinal diseases, and superimposed pathologic conditions. Moreover, endoscopy might be contraindicated in some clinical settings due to the risk of colonic perforation. In addition to depicting the features of UC activity in different phases, MRE demonstrates findings of disease chronicity that cannot be achieved with endoscopy, particularly in a patient with colitis of unknown cause. The valuable diagnostic role of MRE to exclude undiagnosed CD in patients with UC who have refractory disease or those with postproctocolectomy complications is also emphasized. Radiologists can play a crucial role in the management of UC with MRE by addressing what is beyond endoscopy.
    MeSH term(s) Humans ; Colitis, Ulcerative/diagnostic imaging ; Inflammatory Bowel Diseases ; Crohn Disease/diagnostic imaging ; Endoscopy, Gastrointestinal ; Rectum
    Language English
    Publishing date 2023-12-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 603172-9
    ISSN 1527-1323 ; 0271-5333
    ISSN (online) 1527-1323
    ISSN 0271-5333
    DOI 10.1148/rg.230131
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  7. Article ; Online: Pancreaticoduodenal Groove: Spectrum of Disease and Imaging Features.

    Bello, Hernan R / Sekhar, Aarti / Filice, Ross W / Radmard, Amir Reza / Davarpanah, Amir H

    Radiographics : a review publication of the Radiological Society of North America, Inc

    2022  Volume 42, Issue 4, Page(s) 1062–1080

    Abstract: The pancreaticoduodenal groove (PDG) is a small space between the pancreatic head and duodenum where vital interactions between multiple organs and physiologic processes take place. Muscles, nerves, and hormones perform a coordinated dance, allowing bile ...

    Abstract The pancreaticoduodenal groove (PDG) is a small space between the pancreatic head and duodenum where vital interactions between multiple organs and physiologic processes take place. Muscles, nerves, and hormones perform a coordinated dance, allowing bile and pancreatic enzymes to aid in digestion and absorption of critical nutrition. Given the multitude of organs and cells working together, a variety of benign and malignant entities can arise in or adjacent to this space. Management of lesions in this region is also complex and can involve observation, endoscopic resection, or challenging surgeries such as the Whipple procedure. The radiologist plays an important role in evaluation of abnormalities involving the PDG. While CT is usually the first-line examination for evaluation of this complex region, MRI offers complementary information. Although features of abnormalities involving the PDG can often overlap, understanding the characteristic imaging and pathologic features generally allows categorization of disease entities based on the suspected organ of origin and the presence of ancillary features. The goal of the authors is to provide radiologists with a conceptual approach to entities implicating the PDG to increase the accuracy of diagnosis and assist in appropriate management or presurgical planning. They briefly discuss the anatomy of the PDG, followed by a more in-depth presentation of the features of disease categories. A table summarizing the entities that occur in this region by underlying cause and anatomic location is provided.
    MeSH term(s) Duodenum/diagnostic imaging ; Humans ; Magnetic Resonance Imaging/methods ; Pancreas/diagnostic imaging
    Language English
    Publishing date 2022-05-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 603172-9
    ISSN 1527-1323 ; 0271-5333
    ISSN (online) 1527-1323
    ISSN 0271-5333
    DOI 10.1148/rg.210168
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Differential effect of atorvastatin and pravastatin on thoracic spine attenuation: A sub-analysis of a randomized clinical trial.

    Raggi, Paolo / Takyar, Farzin M / Gadiyaram, Varuna / Zhang, Chao / Stillman, Arthur E / Davarpanah, Amir H

    Atherosclerosis

    2023  Volume 388, Page(s) 117425

    Abstract: Background: Statins reduce cardiovascular events and may improve bone mineral density.: Methods: We conducted a sub-analysis of a randomized clinical trial that investigated the differential effect of moderate vs intensive low-density lipoprotein ... ...

    Abstract Background: Statins reduce cardiovascular events and may improve bone mineral density.
    Methods: We conducted a sub-analysis of a randomized clinical trial that investigated the differential effect of moderate vs intensive low-density lipoprotein cholesterol (LDL-C) lowering therapies on coronary artery calcium (CAC) scores, and used the acquired images to assess the change in radiological attenuation of selected thoracic vertebrae. Baseline and 12-month unenhanced chest CT scans were performed in 420 hyperlipidemic, postmenopausal women randomized to atorvastatin (ATV) 80 mg/day or pravastatin (PRV) 40 mg/day in the Beyond Endorsed Lipid Lowering with Electron Beam Tomography Scanning (BELLES) trial. Bone attenuation was measured in three contiguous thoracic vertebrae at baseline and 12 months.
    Results: There were no differences in baseline demographic and clinical characteristics between treatment arms. The median percent lowering (interquartile range) in LDL-C was significantly greater with ATV than PRV [-53 (-69 to 20)% vs -28 (-55 to 74)%, p < 0.001], although the CAC score change was similar [12 (-63 to 208)% vs 13 (-75 to 358)%; p = 0.44]. At follow-up, the median bone attenuation loss was significantly greater with PRV than with ATV [-2.6 (-27 to 11)% vs 0 (-11 to 25)%; p < 0.001]. The attenuation loss in the PRV group was comparable to that of a historical untreated general population sample. In the entire cohort, the changes in LDL-C and total cholesterol were inversely correlated with bone attenuation change (p < 0.01). In adjusted multivariable linear regression analyses, race and percent change in LDL-C were independent predictors of bone attenuation change. Age, body mass index, history of smoking, diabetes mellitus, hypertension, peripheral vascular disease, or hormone replacement therapy did not affect percent change in BMD.
    Conclusions: These findings support the hypothesis that there is an interaction between bone and cardiometabolic health and that intensive lipid lowering has a beneficial effect on bone health.
    MeSH term(s) Humans ; Female ; Atorvastatin/therapeutic use ; Pravastatin/therapeutic use ; Cholesterol, LDL ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/therapeutic use ; Hyperlipidemias/drug therapy ; Pyrroles/therapeutic use ; Anticholesteremic Agents/therapeutic use
    Chemical Substances Atorvastatin (A0JWA85V8F) ; Pravastatin (KXO2KT9N0G) ; Cholesterol, LDL ; Hydroxymethylglutaryl-CoA Reductase Inhibitors ; Pyrroles ; Anticholesteremic Agents
    Language English
    Publishing date 2023-12-12
    Publishing country Ireland
    Document type Randomized Controlled Trial ; Journal Article
    ZDB-ID 80061-2
    ISSN 1879-1484 ; 0021-9150
    ISSN (online) 1879-1484
    ISSN 0021-9150
    DOI 10.1016/j.atherosclerosis.2023.117425
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  9. Article ; Online: The inside-out appendix.

    Davarpanah, Amir H / Bokhari, Jamal

    Surgery

    2018  Volume 163, Issue 4, Page(s) 967

    MeSH term(s) Adult ; Appendix/diagnostic imaging ; Appendix/pathology ; Cecal Diseases/diagnostic imaging ; Cecal Diseases/pathology ; Female ; Humans ; Intussusception/diagnostic imaging ; Intussusception/pathology ; Tomography, X-Ray Computed
    Language English
    Publishing date 2018-01-05
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 202467-6
    ISSN 1532-7361 ; 0039-6060
    ISSN (online) 1532-7361
    ISSN 0039-6060
    DOI 10.1016/j.surg.2017.09.024
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  10. Article ; Online: Feasibility of Hepatic T1-Mapping and Extracellular Volume Quantification on Routine Cardiac Magnetic Resonance Imaging in Patients with Infiltrative and Systemic Disorders.

    Dolan, Ryan S / Stillman, Arthur E / Davarpanah, Amir H

    Academic radiology

    2021  Volume 29 Suppl 4, Page(s) S100–S109

    Abstract: Rationale and objectives: Cardiac magnetic resonance imaging (CMR) is commonly obtained to evaluate for myocardial infiltrative disorders and fibrosis. Pre- and post-Gadolinium contrast T1-mapping sequences are employed to estimate interstitial ... ...

    Abstract Rationale and objectives: Cardiac magnetic resonance imaging (CMR) is commonly obtained to evaluate for myocardial infiltrative disorders and fibrosis. Pre- and post-Gadolinium contrast T1-mapping sequences are employed to estimate interstitial expansion using extracellular volume fraction (ECV). Given the proximity of the liver to the heart, T1 and ECV quantification of the liver is feasible on CMR. The purpose of this study was to evaluate for hepatic measures of fibrosis and interstitial expansion in patients with amyloidosis or systemic disease on CMR.
    Materials and methods: Myocardial and hepatic native T1 values were measured retrospectively using a cardiac short axis modified Look-Locker inversion recovery sequence. Myocardial and hepatic ECV were calculated using pre- and post-contrast T1 and blood pool values according to the following formula: ECV = (Δ(1/T1) myocardium or liver and/or Δ(1/T1) blood)x(1 - hematocrit). Patients were divided into three cohorts by final diagnosis: amyloidosis, systemic disease (e.g. sarcoid, scleroderma), and controls (EF > 50, no ischemia).
    Results: Of the 135 patients who underwent CMR, 22 had cardiac amyloidosis (age 59.9 ± 12.6 yrs, 41% female), 20 had systemic disease (age 50.9 ± 13.4 yrs, 35% female), and 93 were controls (age 49.5 ± 17.3 yrs, 50% female). Myocardial T1 and ECV values were highest for patients with amyloid, second highest for systemic disease, and least for controls (T1: 1169 ± 92 vs 1101 ± 53 vs 1027 ± 73 ms, p < 0.0001; ECV: 0.47 ± 0.11 vs 0.31 ± 0.05 vs 0.27 ± 0.04, p < 0.0001). Hepatic T1 and ECV were similarly higher in patients with amyloid and systemic disease compared to controls (T1: 646 ± 101 vs 660 ± 93 vs 595 ± 58 ms, p < 0.0001; ECV: 0.38 ± 0.08 vs 0.37 ± 0.05 vs 0.31 ± 0.03, p < 0.0001). There was a positive correlation between hepatic T1 and ECV (R
    Conclusion: Hepatic ECV quantification on CMR in patients with amyloidosis and systemic disorders is feasible. Further longitudinal investigation regarding detection of early or subclinical liver disease is warranted.
    MeSH term(s) Adult ; Aged ; Amyloidosis/diagnostic imaging ; Cardiomyopathies/diagnostic imaging ; Contrast Media ; Feasibility Studies ; Female ; Fibrosis ; Humans ; Liver/pathology ; Magnetic Resonance Imaging/methods ; Magnetic Resonance Imaging, Cine/methods ; Male ; Middle Aged ; Predictive Value of Tests ; Retrospective Studies
    Chemical Substances Contrast Media
    Language English
    Publishing date 2021-10-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1355509-1
    ISSN 1878-4046 ; 1076-6332
    ISSN (online) 1878-4046
    ISSN 1076-6332
    DOI 10.1016/j.acra.2021.09.018
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