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Journal of Nuclear Cardiology :... Jun 2021
Topics: Angiography; Echocardiography; Gated Blood-Pool Imaging; Humans; Reproducibility of Results; Stroke Volume; Tricuspid Valve Insufficiency; Ventricular Function, Left
PubMed: 31350716
DOI: 10.1007/s12350-019-01826-5 -
Pediatric Cardiology Jan 2023The aim of the study was to determine the variables associated with high-quality (HQ) versus low-quality (LQ) three-dimensional rotational angiography (3DRA) and create...
The aim of the study was to determine the variables associated with high-quality (HQ) versus low-quality (LQ) three-dimensional rotational angiography (3DRA) and create guides for optimization of approach to 3DRA in congenital cardiac catheterization (CCC). CCC has adopted 3DRA as a mainstay, but there has not been systematic analysis of approach to and factors associated with HQ 3DRA. This was a single-center, retrospective study of 3DRAs using Canon Infinix-I platform. Reconstructions were graded by 3 interventionalists. Quality was dichotomized into HQ and LQ. Univariable analyses and multivariable logistic regression models were performed. From 8/2016 to 12/2018, 208 3DRAs were performed in 195 CCCs; median age 7 years (2, 16), weight 23 kg (12, 57). The majority of 3DRAs were performed in patients with biventricular physiology (N = 137, 66%) and in pulsatile sites (N = 144, 69%). HQ 3DRA (N = 182, 88%) was associated with greater total injection volume [2.20 mL/kg (1.44, 3.29) vs. 1.62 mL/kg (1.10, 1.98), p = 0.005] and more dilute contrast solution [60% (50, 100) vs. 100% (60, 100), p = 0.007], but not with contrast volume administered (p = 0.2) on univariable analysis. On multivariable logistic regression, HQ 3DRA was significantly associated with patient weight [OR 0.97 (95% CI (0.94, 0.99), p = 0.018], total injection volume [OR 1.04 (95% CI 1.01, 1.07) p = 0.011], and percent contrast solution [OR 0.97 (95% CI 0.95, 1.00), p = 0.022]. These data resulted in creation of scatter plots and a novel 3DRA Nomogram for estimating the probability of HQ 3DRA. This is the first study to create evidence-based contrast dose guides and nomogram for 3DRA in CCC. HQ 3DRA was associated with lower weight, higher total injection volumes, and more dilute contrast solution.
Topics: Humans; Child; Retrospective Studies; Imaging, Three-Dimensional; Angiography; Cardiac Catheterization; Plastic Surgery Procedures
PubMed: 36029321
DOI: 10.1007/s00246-022-02994-x -
Operative Neurosurgery (Hagerstown, Md.) Jul 2021
Topics: Angiography, Digital Subtraction; Cerebral Angiography; Humans; Intracranial Aneurysm; Surgical Instruments
PubMed: 33861340
DOI: 10.1093/ons/opab093 -
Journal of Glaucoma Jun 2022Face mask wearing has no significant effects on artifacts or vessel density measurements in optic nerve head (ONH) and macular optical coherence tomography-angiography...
PRCIS
Face mask wearing has no significant effects on artifacts or vessel density measurements in optic nerve head (ONH) and macular optical coherence tomography-angiography (OCT-A) scans.
PURPOSE
The aim was to assess the difference in area of artifacts observed in optical OCT-A scans with and without face mask wear and to verify if mask wear interferes with OCT-A vessel density measurements.
SUBJECTS AND CONTROLS
A total of 64 eyes of 10 healthy subjects, 4 ocular hypertensive, 8 glaucoma suspects, and 17 glaucoma patients were included.
MATERIALS AND METHODS
High-density ONH and macula OCT-A scans were obtained in patients with and without surgical masks. Seven different artifacts (motion, decentration, defocus, shadow, segmentation failure, blink, and Z-offset) were quantitatively evaluated by 2 trained graders. The changes in the area (% of scan area) of artifacts, without and with mask wearing, and differences of vessel density were evaluated.
RESULTS
Trends of increasing motion artifact area for the ONH scans [4.23 (-0.52, 8.98) %, P=0.08] and defocus artifact area for the macular scans [1.06 (-0.14, 2.26) %, P=0.08] were found with face mask wear. However, there were no significant differences in the mean % area of any artifacts (P>0.05 for all). Further, the estimated mean difference in vessel density in images acquired without and with masks was not significant for any type of artifact.
CONCLUSION
Face mask wearing had no significant effect on area of artifacts or vessel density measurements. OCT-A vessel density measurements can be acquired reliably with face mask wear during the pandemic.
Topics: Angiography; Artifacts; COVID-19; Fluorescein Angiography; Glaucoma; Humans; Intraocular Pressure; Masks; Pandemics; Retinal Vessels; Tomography, Optical Coherence
PubMed: 35320142
DOI: 10.1097/IJG.0000000000002019 -
Journal of Neurological Surgery. Part... Sep 2021Preoperative planning mainly relies on digital subtraction angiography (DSA) and computed tomography angiography. However, neither technique can reveal thrombi in...
BACKGROUND
Preoperative planning mainly relies on digital subtraction angiography (DSA) and computed tomography angiography. However, neither technique can reveal thrombi in giant intracranial aneurysms (GIAs). In this study, we aimed to reconstruct the circulating and noncirculating parts of GIAs with the time-of-flight (TOF) and motion-sensitized driven-equilibrium (MSDE) sequences with 3D Slicer to reveal an integrated presentation of GIAs, compare its accuracy, and validate the usefulness for preoperative planning.
MATERIAL AND METHODS
Patients with GIAs who were treated with microsurgery in our department were included in this study. Both the TOF and MSDE sequence data for each patient were loaded into 3D Slicer for reconstruction and segmentation. The parameters measured by 3D Slicer were compared with those measured by DSA.
RESULTS
The mean diameter for all GIAs was 28.7 ± 1.5 mm (range, 25.9-31.9 mm). The mean diameter for all GIAs measured by DSA and 3D Slicer was 24.46 ± 5.25 and 28.66 ± 1.48 mm, respectively ( = 4.948, < 0.01). When only the nonthrombotic GIAs were included, the mean diameter measured by DSA and 3D Slicer was 28.69 ± 2.03 and 28.97 ± 1.79 mm, respectively ( = 1.023, = 0.323). The mean aneurysmal volume was 8,292.6 ± 1,175.1 mm and the mean thrombotic volume was 3,590.0 ± 1,003.7 mm.
CONCLUSION
The MSDE sequence brings diagnostic benefits as a comparison to other MRI sequences. Reconstruction of GIAs with 3D Slicer is a low-cost, dependable, and useful supplemental technique for surgical planning.
Topics: Angiography, Digital Subtraction; Cerebral Angiography; Humans; Imaging, Three-Dimensional; Intracranial Aneurysm; Magnetic Resonance Angiography; Microsurgery; Sensitivity and Specificity; Tomography, X-Ray Computed
PubMed: 33583010
DOI: 10.1055/s-0040-1721006 -
Tomography (Ann Arbor, Mich.) Sep 2022Gastrointestinal bleeding is a potentially life-threatening abdominal emergency that remains a common cause of hospitalisation. Although 80-85% of cases of... (Review)
Review
Gastrointestinal bleeding is a potentially life-threatening abdominal emergency that remains a common cause of hospitalisation. Although 80-85% of cases of gastrointestinal bleeding resolve spontaneously, it can result in massive haemorrhage and death. The presentation of gastrointestinal bleeding can range from asymptomatic or mildly ill patients requiring only conservative treatments to severely ill patients requiring immediate intervention. Identifying the source of the bleeding can be difficult due to the wide range of potential causes, the length of the gastrointestinal tract and the intermittent nature of the bleeding. The diagnostic and therapeutic approach is fully dependent on the nature of the bleeding and the patient's haemodynamic status. Radiologists should be aware of the appropriate uses of computed tomography angiography and other imaging modalities in patients with acute gastrointestinal bleeding, as well as the semiotics of bleeding and diagnostic pitfalls in order to appropriately diagnose and manage these patients. The learning objective of this review is to illustrate the computed tomography angiography technique, including the potential role of dual-energy computed tomography angiography, also highlighting the tips and tricks to identify the most common and uncommon features of acute gastrointestinal bleeding and its obscure form.
Topics: Humans; Computed Tomography Angiography; Angiography; Gastrointestinal Hemorrhage; Tomography, X-Ray Computed; Acute Disease
PubMed: 36287797
DOI: 10.3390/tomography8050198 -
Operative Neurosurgery (Hagerstown, Md.) Sep 2021
Topics: Angiography, Digital Subtraction; Cerebral Angiography; Humans; Intracranial Aneurysm; Surgical Instruments
PubMed: 34171916
DOI: 10.1093/ons/opab249 -
Interventional Neuroradiology : Journal... Feb 2022There is no study on the role of three-dimensional compressed sensing time of flight MR angiography (3D-CS-TOF) in the management of the WEB device. We evaluated the...
PURPOSE
There is no study on the role of three-dimensional compressed sensing time of flight MR angiography (3D-CS-TOF) in the management of the WEB device. We evaluated the efficacy of 3-tesla 3D-CS-TOF for the management and follow-up of the WEB device implantations.
MATERIALS AND METHODS
Seventy-three aneurysms of 69 patients treated with the WEB device were retrospectively examined. Morphological parameters and embolization results of the aneurysms were assessed and compared on 3D-CS-TOF, CTA, and DSA images.
RESULTS
Occluded, neck remnant, and recurrent aneurysms were observed in 61 (83.6%), 7 (9.6%), and 5 (6.8%) aneurysms, respectively. Inter- and intra-reader agreement values related to aneurysm size measurements were perfect. Aneurysms size, age, and proximal vessel tortuosity were negatively correlated with the visibility of the aneurysms and parent vessels on 3D-CS-TOF images (p = 0.043; p = 0.032; p < 0.001, respectively). Subarachnoid hemorrhage and age are associated with 3D-CS-TOF artifacts (p = 0.031; p = 0.005, respectively). 3D-CS-TOF findings are in perfect agreement with DSA or CT angiography (CTA) results (p < 0.001).
CONCLUSION
According to our results, 3D-CS-TOF can be an easy, fast, and reliable alternative for the management or follow-up of WEB assisted embolization.
Topics: Angiography, Digital Subtraction; Cerebral Angiography; Computed Tomography Angiography; Follow-Up Studies; Humans; Imaging, Three-Dimensional; Intracranial Aneurysm; Magnetic Resonance Angiography; Retrospective Studies; Sensitivity and Specificity
PubMed: 33957798
DOI: 10.1177/15910199211014708 -
BMC Cardiovascular Disorders Dec 2022Despite advances in endovascular techniques to treat acute limb ischemia (ALI), evaluation of clinical outcomes for revascularization remains challenging, especially the...
BACKGROUND
Despite advances in endovascular techniques to treat acute limb ischemia (ALI), evaluation of clinical outcomes for revascularization remains challenging, especially the accurate quantification of post-endovascular limb perfusion. This study aimed to investigate the accuracy and value of 2D perfusion angiography to evaluate endovascular intervention for ALI.
METHODS
A total of 47 patients with ALI were retrospectively analyzed. The transcutaneous oxygen partial pressure (TcPO2) was obtained using laser Doppler blood perfusion monitoring. The ankle-brachial index (ABI) and angiographic images were obtained before and after endovascular intervention. iFlow imaging was used to obtain color-coded images. Regions of interest (ROIs) at the femoral head, knee joint, and ankle joint were selected to obtain the time to peak (TTP). The differences in the TTP between the knee and femoral head regions (TTP difference in the knee area) and between the ankle and knee regions (TTP difference in the ankle area) were observed. The TTP, ABI, and TcPO2 between the complete response (CR), partial response (PR), no response (NR), and amputation (AM) groups were compared. The correlation between TTP changes in the ankle area (ΔTTP) and changes in ABI (ΔABI)/changes in TcPO2 (ΔTcPO2) was analyzed.
RESULTS
There was a significant increase in both TcPO2 and ABI compared with the pre-intervention values (27.75 ± 5.32 vs 40.92 ± 4.62, and 0.35 ± 0.16 vs 0.79 ± 0.15, respectively, all p < 0.01). The post-intervention TTP differences in the knee areas (5.12 ± 2.45 s) and ankle areas (6.93 ± 4.37 s) were significantly faster than pre-intervention TTP differences (7.03 ± 2.57 s and 10.66 ± 4.07 s, respectively, all p < 0.05). The post-operative TTP in the ankle area, post-operative TTP difference in the ankle area, and ΔTTP in the AM group were higher than the values in the CR and PR groups. The ΔTTP demonstrated strong correlation with ΔABI (r = -0.722, p < 0.01) and ΔTcPO2 (r = -0.734, p < 0.01).
CONCLUSIONS
2D perfusion angiography with enhanced visual and quantitative analysis exhibits great potential to evaluate the efficacy of endovascular intervention, and provides a quantitative and sensitive tool to evaluate post-endovascular limb perfusion for ALI patients.
Topics: Humans; Angiography; Ischemia; Perfusion; Retrospective Studies
PubMed: 36463099
DOI: 10.1186/s12872-022-02979-x -
The Artery of Adamkiewicz: Anatomy and Considerations in Spine Surgery - A Review of the Literature.Journal of Long-term Effects of Medical... 2022The artery of Adamkiewicz (AKA) provides blood supply to the thoracolumbar spinal cord. Any disruption of the AKA can lead to the anterior spinal artery (ASA) syndrome,... (Review)
Review
The artery of Adamkiewicz (AKA) provides blood supply to the thoracolumbar spinal cord. Any disruption of the AKA can lead to the anterior spinal artery (ASA) syndrome, with devastating systematic and neurologic complications for the patient. This is a narrative review of the anatomy of AKA, the characteristics of ASA syndrome and the role of radiologic techniques in diagnosis and treatment. A detailed search of the PubMed database was conducted from January 2000 until April 2020, to locate articles relevant to our study. The references of the included studies were also retrieved in order not to miss any information. The ASA syndrome can present as a possible post-operative complication after minimally invasive or open surgeries of multiple specialties that involve the field of spine. Risk factors associated with ASA syndrome include; kyphosis of the patient, corresponding spinal surgical approach, intraoperative hypotension, multiple ligations of the AKA, a left side approach and a 360-combined or revision surgery. The incidence varies among different operations. Many different imaging modalities have been used in preoperative plan, including but not limited to computed tomography angiography, magnetic resonance angiography, and subtraction angiography. The use of computed tomography angiography or magnetic resonance angiography preoperatively can play a major role in the prevention of the ASA syndrome. However, more research needs to be done before making any final assumptions.
Topics: Angiography; Arteries; Humans; Spinal Cord; Spine; Tomography, X-Ray Computed
PubMed: 35695630
DOI: 10.1615/JLongTermEffMedImplants.2022038879