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Dual-source technology extends CT applicationsCT is one of the most important of the noninvasive imaging modalities, providing 3D representations of the x-ray attenuation coefficient with submillimeter spatial resolution.
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Bilateral brachymetapodyThis 41-year-old woman presented with a known history of bilateral foot deformities and new complaints of bilateral foot pain. She had associated hallux valgus deformities.
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Dynamic contrast-enhanced MR imaging finally comes of ageTumors require new blood vessels in order to grow beyond a few millimeters in size. Once this "angiogenic switch" is thrown, a series of events occur that lead to the progression and spread of cancer. The vessels formed by tumors are not only larger and more numerous but also more permeable than normal vessels1 (Figure 1). Thus, when a patient with a tumor is injected with a gadolinium-chelate MR contrast agent, the tumor enhances more than the surrounding normal tissue.
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Targeted therapies gain groundon hard-to-treat liver tumorsNot long ago, our approach to treating difficultmetastatic tumors was to "spray and pray." Weknew that chemotherapy and other traditionaltreatment approaches could cause great damageand had a limited chance of successfully destroyingthe entire tumor.
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MR imaging ensures clarity in focal liver lesionsMost benign lesions considered unspecific on ultrasound or CT can be identified with great confidence on MRI
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Dose reduction measures benefit pediatric patientsBalancing the benefits of a procedure involving ionizing radiation against the possibility of unwanted damage is often difficult. Regulations on exposure must consider medical, economic, and ethical aspects of radiation as well as the individual and collective dose of the population.
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Ovarian lesions pose diagnostic dilemmasThe main objective of imaging patients with symptoms suggestive of ovarian lesions is to distinguish benign findings from malignant disease. Masses can be characterized with a variety of noninvasive imaging techniques, including transabdominal and transvaginal ultrasound, CT, and MRI. Each of these modalities has its advantages and limitations.
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MRI, ultrasound offer hope to arthritis patientsMRI and ultrasound can be useful tools in evaluating patients with early rheumatoid arthritis. Both techniques can detect pre-erosive synovial inflammation. They can also identify early bone damage before it becomes apparent on x-rays.
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MR imaging adds weight to sacroiliitis diagnosisEarly diagnosis of rheumatoid arthritis and monitoring of the disease during therapy have attracted considerable interest over the past decade. Imaging studies of seronegative spondyloarthropathies, however, are few and far between, even though these disorders occur as frequently as rheumatoid arthritis. Now the potential promise of biological therapy to treat ankylosing spondylitis, one of the most disabling seronegative spondyloarthropathies, is focusing attention on techniques capable of detecting the disease early and tracking its progress through treatment.
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Real-time elasticity findingsimprove breast specificityUltrasound has long been an efficient and usefuladjunct technique for breast imaging. It is thefirst modality to be proposed in some situations:if a young or pregnant woman has a palpablemass, for example, or immediately after surgery.
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40-slice scanners boost neuro CT angiographyThe introduction of 40-slice CT scanners has opened up new possibilities for CT angiography of the supra-aortal vasculature. Imaging can be performed with even thinner slices, and more rapidly, than on 16-slice systems, and images have higher resolution. Conventional protocols for imaging the brain and its arterial supply must be adjusted to profit from these parameters.
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Reliable In-Stent Lumen Visualization With Dual Source CT Coronary AngiographyA 58-year-old man with a history of hypertension and hypercholesterolemia was admitted to the hospital with symptoms of suspected stable angina pectoris. The patient was referred to conventional coronary angiography after a positive exercise-ECG test. Conventional angiography showed significant stenoses at the level of the proximal right coronary artery (RCA) and the proximal left anterior descending coronary artery (LAD). Percutaneous intervention was undertaken and one bare-metal stent in the RCA and two overlapping bare-metal stents in the LAD were successfully implanted. The patient was referred to follow-up CT coronary angiography after 18 months.
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MSCT assists in renal cell cancer workupRenal cell cancer is the most frequently encountered malignant tumor in the kidney. Over 30,000 new cases are diagnosed annually in the U.S. Many cases are now detected incidentally, as a result of the widespread use of multislice CT. MSCT usage is also redefining diagnostic workup of renal lesions and facilitating renal cell cancer staging.
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64-slice CT monitors coronary artery healthState-of-the-art scanners enable noninvasive assessment of bypass grafts and native vasculature for patency and arterial disease
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An Impressive Case of Procidentia with Concomitant Cystocele and HydronephrosisClinical History: A 45 year old African-American nulligravida female presented to the emergency department complaining of 8/10 nonradiating pain deep within her vagina.
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Radiology's role grows in schistosomiasis mansoniMost infected individuals remain asymptomatic carriers, but hepatosplenic form of schistosomiasis can be associated with serious complications
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MRS, perfusion MRI separate radiation necrosis from tumorRadiation plays an important role in the treatmentof primary and secondary centralnervous system neoplasms.
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Three-D techniques showcase the pancreas and biliaryThe advent of multislice CT, advanced computer workstations, and 3D and postprocessing algorithms has allowed for new perspectives from which to view imaging data. These are especially useful for pancreatic cancer and biliary pathology.
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Image IQ: 34-year-old Male, Worsening Numbness and Weakness34-year-old male presented with worsening numbness and increasing weakness in right hand, progressing to proximal right upper extremity.
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Now That It’s Over, Thoughts on the ABR Certifying ExamResults are in for the first group of radiologists to take the ABR Certifying Exam.
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CT and MRI give answers in cardiac neoplasmsNoninvasive cardiac imaging is gaining widespread acceptance. Both CT and MRI can determine the absence or presence of coronary artery disease accurately and reliably. This is done by either assessing the coronary artery morphology or by offering detailed insight into functional aspects and myocardial perfusion.
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Do Your Diagnostic LCD Monitors Meet the Guidelines?Three suggestions for radiology practices to consider when adopting the new Technical Standard for Electronic Practice of Medical Imaging.
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No premedication equals fewer staff, more patientsCoronary CT angiography is commonly performed using beta blockers to slow the heart rate and reduce motion artifacts in the images, thereby improving diagnostic accuracy. Oral metoprolol is often prescribed one hour prior to the procedure. Intravenous metoprolol may be given immediately prior to the procedure as an alternative or if oral beta blocker alone did not achieve adequate heart rate control.
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Endobronchial TuberculosisCase history: A 67-year-old female with a history of long standing goiter presented with a short onset history of cough and breathlessness. She did not have any fever or hemoptysis. The chest X-ray was unremarkable.
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Small bowel findings reveal tumor spectrumThe spectrum of usual and unusual primary neoplasms involving the duodenum, jejunum, and ileum is extremely wide. Our own database of digestive pathology contains a range of benign small bowel neoplasms (adenoma, leiomyoma, lipoma, familial polyposis, hemangioma, lymphangioma, and fibroma), as well as examples of malignancy (adenocarcinoma, carcinoid tumor, lymphoma, leiomyosarcoma, direct extension from extraintestinal tumors, and metastasic lesions).
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No More Déjà Vu - Improving Your Practice in 2011We must accept: 1) the assertion that market and political forces are designed to lower our incomes and profits; and 2) it is our responsibility to innovate and act proactively to manage change. With this acceptance we can actually improve our income and profits rather than sitting on the sidelines as a helpless non-participant. Please join us this year with this mind set as our focus.
