Ratan Verma

South Warwickshire NHS Foundation Trust, Warwick, England, United Kingdom

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Publications (12)23.86 Total impact

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    ABSTRACT: OBJECTIVE: The purpose of this article is to review the technique of performing MR enterography examinations and to review the imaging findings suggestive of Crohn disease. This article will also allow the reader to self-assess and improve his or her skills in the performance and interpretation of MR enterography examinations. CONCLUSION: MRI plays a valuable role in providing accurate information about the severity of and complications related to Crohn disease and can help in guiding surgical or medical treatment.
    American Journal of Roentgenology 07/2011; 197(1):76-9. · 2.74 Impact Factor
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    ABSTRACT: OBJECTIVE: The purpose of this article is to review MR enterography technique and imaging findings suggestive of Crohn disease on these examinations. This article will also allow the reader to self-assess and improve his or her skills in the performance and interpretation of MR enterography examinations. CONCLUSION: This article reviews the technique of performing MR enterography examinations. MRI plays a valuable role in providing accurate information about severity of and complications related to Crohn disease and can help in guiding surgical or medical treatment.
    American Journal of Roentgenology 07/2011; 197(1):80-5. · 2.74 Impact Factor
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    ABSTRACT: The purpose of this review is to illustrate, with examples, the abdominal manifestations of neurofibromatosis type 1 (NF) on imaging, with emphasis on computed tomography. Mutations of the NF gene lead to abnormal tumor suppression. Consequently, NF is a complex disease, with patients having an increased prevalence of benign and malignant neoplasms throughout the body. We present cases of the most common abdominal presentations: neurofibroma, malignant peripheral nerve sheath tumor, pheochromocytoma, carcinoid, gastrointestinal stromal tumor, and seminoma.
    Journal of Computer Assisted Tomography 01/2008; 32(1):4-8. · 1.60 Impact Factor
  • Rakesh Sinha, Ratan Verma
    Radiology 03/2007; 242(2):625-7. · 6.21 Impact Factor
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    ABSTRACT: The aim of the study was to evaluate the incidence of pulmonary metastases detected on thoracic computed tomography in patients with rectal cancer and assess the association between the incidence of pulmonary metastases and the stage of the rectal tumor. Fifty-six consecutive patients who were diagnosed with rectal cancer over a 22-month period were included in the study. These patients had local tumor staging with a pelvic magnetic resonance imaging and staging computed tomographic scan of the chest and upper abdomen immediately after the magnetic resonance imaging. Two radiologists retrospectively reviewed all the thoracic imaging performed on these patients for the presence of metastases. The presence of a parenchymal lung nodule (greater than or equal to 1 cm if single and 0.5 cm if multiple) with a soft tissue component without calcification on lung and mediastinal window settings was considered positive for the presence of metastasis. All other patients were considered as not having any lung metastases. Of the 56 patients, 10 (17.9%) had evidence of pulmonary metastases on computed tomography. Of the 56 patients, there were 3 patients with stage T1, 24 with T2, 26 with T3, and 3 with stage T4 tumors. Of these 10 patients, 1 had a stage T2 tumor, 7 had T3, and 2 had stage T4 tumors. Statistical analysis using exact logistic regression showed the odds of getting lung metastases is an increasing function of tumor grade. There is a high incidence of lung metastases in patients with rectal cancer, and thoracic computed tomographic scanning should be performed as part of a staging protocol in all patients before any form of treatment is planned. There is a higher incidence of lung metastases with higher T stage.
    Journal of Computer Assisted Tomography 01/2007; 31(4):569-71. · 1.60 Impact Factor
  • Article: Case 1061
    Rakesh Sinha, Ratan Verma
    Radiology 01/2006; 241(1):306-307. · 6.21 Impact Factor
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    ABSTRACT: LEARNING OBJECTIVES To illustrate the spectrum of benign and malignant neoplasms involving the duodenum, jejunum and ileum on multi-detector CT (MDCT). To understand the imaging features and differential diagnosis on the basis of pathologic correlation. To demonstrate the usefulness of multiplanar reconstructions in accurate localization and staging of tumours. ABSTRACT Neoplasms of the small bowel are rare lesions and account for 5% of gastro-intestinal tumors. Our aim is to demonstrate the imaging features of various small bowel neoplasms on MDCT. The tumours illustrated include benign(adenoma, GIST, lipoma, haemangioma, small bowel polyps) and malignant( GIST, adenocarcinoma, carcinoid tumour, lymphoma, metastases). The multiplanar, high-resolution imaging capabalities of MDCT help to accurately demonstrate the origin of these tumours in the small bowel and demonstrate extra-intestinal extension. Imaging features such as calcification, desmoplastic reaction, ulceration and bowel obstruction are also well shown on MDCT. MDCT can also reliably detect complications related to bowel tumours such as intussusception, volvulus and obstruction. Diagnostic pitfalls, difficulties and differential diagnoses on MDCT are also demonstrated.
    Radiological Society of North America 2005 Scientific Assembly and Annual Meeting; 11/2005
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    Sinha R, Verma R, Tyagi R
    Journal of Postgraduate Medicine (ISSN: 0022-3859) Vol 51 Num 2. 01/2005;
  • Rakesh Sinha, Ratan Verma, Andrew Kong
    American Journal of Roentgenology 01/2005; 183(6):1844-6. · 2.74 Impact Factor
  • Rakesh Sinha, Ratan Verma
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    ABSTRACT: LEARNING OBJECTIVES Recognising the various causes of small and large bowel obstructions.Identifying the Multidetector CT (MDCT) features of various causes of bowel obstruction.Discuss the role of MDCT in small and large bowel obstruction.Awareness of capabilities of MDCT such as multiplanar imaging, CT angiogram, bowel fly-through views. ABSTRACT The role of CT is established in the imaging of small bowel obstruction. With the recent technological developments and availability of Multidetector CTs (MDCT), computed tomography has achieved a pre-eminent role in the imaging of bowel obstruction. The short scanning time of MDCTs reduces motion or breathing artefacts. The thin-section mutiplanar reformatting capability greatly enhances image quality and is crucial in demonstrating pathologies involving the bowel wall, mesentery, vasculature and the peritoneal cavity. The multiplanar capability also helps in accurately locating the site, level and nature of obstruction. It is also possible to perform CT-angiograms in suspected cases of mesenteric ischaemia. The role of MDCT in imaging of small bowel obstruction is documented, however it can also be very useful in imaging of large bowel obstruction. The unique capabilities of MDCT make it the most useful radiological tool in the diagnosis of small and large bowel obstruction.
    Radiological Society of North America 2004 Scientific Assembly and Annual Meeting; 11/2004
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    ABSTRACT: PURPOSE/AIM 1. To describe the various imaging findings in primary abdominal sarcomas and other rare tumours and to identify features that enable characterisation 2. To illustrate imaging findings that help in localising tumours 3. To discuss patterns of spread of these rare tumours CONTENT ORGANIZATION 1. Introduction 2. Tumour localisation 3. Imaging features and characterisation on: a. Computed Tomography b. Magnetic resonance Imaging 4. Patterns of spread and recurrence 5. Appearances after novel methods of treatment (including radiation therapy and use of omental slings and saline spacers) SUMMARY This exhibit will help the reader to understand the diagnostic features of primary abdominal sarcomas and other rare tumours, enable accurate tumour localisation and characterisation. This exhibit will also illustrate and discuss patterns of spread and recurrence and post treatment appearances
    Radiological Society of North America 2009 Scientific Assembly and Annual Meeting;
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    ABSTRACT: PURPOSE/AIM Various disease processes affect the small bowel and identification of etiology can be challenging. Although some disease processes may have a pathognomonic appearance, in most cases, a systematic approach may help in narrowing the differential diagnosis. CONTENT ORGANIZATION Systematic approach includes evaluating: extent of bowel involved, mucosa, sub-mucosal and mural thickening and density, mesentery, vasculature and lymph nodes, other intra-abdominal organs, and extra-abdominal changes. Representive cases of inflammatory, infectious, vascular, neoplastic and miscellaneous conditions will be presented with multimodality imaging, including cutting edge tools, and with emphasis on narrowing the differential diagnosis using a systematic approach. SUMMARY This exhibit will aid the viewer to approach small bowel pathology in a systematic pattern in order to provide a concise differential diagnosis of the most likely pathology.
    Radiological Society of North America 2011 Scientific Assembly and Annual Meeting;