Luis Guimaraes
Dr. Luis Guimaraes is a Staff Abdominal Radiologist at the Joint Department of Medical Imaging (JDMI) in Toronto, and a clinician investigator at University Health Network (UHN). He is also an Assistant Professor at the University of Toronto.
Dr. Guimaraes graduated from the Faculdade de Medicina do Porto in Portugal, followed by radiology residency at Hospital S. Teotonio in Viseu, Portugal. He then completed clinical observership and research fellowship at the Mayo Clinic in Rochester, MN, USA, after which obtained a PhD at Faculdade de Medicina do Porto and completed Clinical Fellowship at the Joint Department of Medical Imaging at the University of Toronto.
Dr. Guimaraes is a soccer fan and supports a Portuguese soccer team Benfica. He is also an avid music listener and plays the flute in his spare time.
- Editorial Comment: Toward Precise and Reproducible Iodine Quantification With Dual-Energy CT-Getting Closer, but Not There Yet
No abstract
- CT Noise-Reduction Methods for Lower-Dose Scanning: Strengths and Weaknesses of Iterative Reconstruction Algorithms and New Techniques
Iterative reconstruction (IR) algorithms are the most widely used CT noise-reduction method to improve image quality and have greatly facilitated […]
- The added value of contrast-enhanced ultrasound in evaluation of indeterminate small solid renal masses and risk stratification of cystic renal lesions
CONCLUSION: In our cohort, CEUS had high specificity and PPV to diagnose RCC in sSRMs excluding lipid-rich AML. CEUS had significantly higher […]
- Dual-energy CT in diffuse liver disease: is there a role?
Dual-energy CT (DECT) can be defined as the use of two different energy levels to identify and quantify material composition. Since its inception, […]
- Magnetic Resonance in Crohn's Disease: Diagnosis, Disease Burden, and Classification
Magnetic resonance enterography (MRE) is an established test in patients with Crohn because of its ability to display transmural enteric inflammation […]
- State of the Art in Abdominal CT: The Limits of Iterative Reconstruction Algorithms
The development and widespread adoption of iterative reconstruction (IR) algorithms for CT have greatly facilitated the contemporary practice of […]
- Anti-TNF therapy and radiation exposure in Crohn's disease: chicken or egg?
No abstract
- Ionizing radiation exposure is still increasing in Crohn's disease: Who should be blamed?
CONCLUSION: Penetrating phenotype, abdominal surgery, steroid resistance or steroid dependence, and treatment with anti-TNF-α and azathioprine were […]
- Invasive micropapillary carcinoma of the breast: imaging features with clinical and pathologic correlation
CONCLUSION: The imaging features of invasive ductal carcinoma of the breast with micropapillary features typically were highly suggestive of […]
- Noise reduction to decrease radiation dose and improve conspicuity of hepatic lesions at contrast-enhanced 80-kV hepatic CT using projection space denoising
CONCLUSION: Eighty-kilovolt imaging with noise reduction can simultaneously increase lesion conspicuity and facilitate radiation dose reduction and […]
- Identification of intraarticular and periarticular uric acid crystals with dual-energy CT: initial evaluation
CONCLUSION: Initial retrospective assessment suggests that dual-energy CT is a sensitive, noninvasive, and reproducible method for identifying uric […]
- Prospective blinded comparison of wireless capsule endoscopy and multiphase CT enterography in obscure gastrointestinal bleeding
CONCLUSION: In this referral population, the sensitivity of CT enterography for detecting small bowel bleeding sources and small bowel masses was […]
- Appropriate patient selection at abdominal dual-energy CT using 80 kV: relationship between patient size, image noise, and image quality
CONCLUSION: An 80-kV abdominal CT can be performed with appropriate diagnostic quality in a substantial percentage of the population, but it is not […]
- Pilot multi-reader study demonstrating potential for dose reduction in dual energy hepatic CT using non-linear blending of mixed kV image datasets
CONCLUSIONS: There is potential for further dose reduction utilizing DE hepatic CT. Radiologist visual preference for mixed-kV images is […]
- Feasibility of dose reduction using novel denoising techniques for low kV (80 kV) CT enterography: optimization and validation
CONCLUSION: Optimized denoising strategies improve the quality of 80-kV CTE images such that CT data obtained at 50% of routine dose levels […]
- Comparative study of two image space noise reduction methods for computed tomography: bilateral filter and nonlocal means
Optimal noise control is important for improving image quality and reducing radiation dose in computed tomography. Here we investigated two image […]
- Metal artifact reduction from reformatted projections for hip prostheses in multislice helical computed tomography: techniques and initial clinical results
CONCLUSIONS: A novel method for reducing metal artifact in multislice helical CT was developed. Initial clinical results showed that the proposed […]
- Assessment of appropriateness of indications for CT enterography in younger patients
CONCLUSIONS: A multidisciplinary expert panel concluded that the vast majority of young patients underwent clinically appropriate first-time CTE […]
- Small bowel obstruction: what to look for
Small bowel obstruction (SBO) is a common clinical syndrome for which effective treatment depends on a rapid and accurate diagnosis. Despite advances […]