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European Radiology Apr 2022
Topics: Angiography; Cerebral Angiography; Cerebrovascular Trauma; Computed Tomography Angiography; Humans; Retrospective Studies; Tomography, X-Ray Computed; Wounds, Nonpenetrating
PubMed: 35092475
DOI: 10.1007/s00330-021-08534-0 -
Journal of Vascular and Interventional... Dec 2019To characterize angiographic and cross-sectional imaging anatomy of the rat visceral vasculature in 2 translational models.
PURPOSE
To characterize angiographic and cross-sectional imaging anatomy of the rat visceral vasculature in 2 translational models.
MATERIALS AND METHODS
Animal studies were conducted in accordance with institutional guidelines and approval of the Institutional Animal Care and Use Committees. Retrospective review of digital subtraction arteriography was performed in 65 Wistar and 50 Sprague-Dawley male rats through a left common carotid artery or right common femoral artery approach. MR imaging of the abdomen was performed on the rats to correlate imaging modalities.
RESULTS
Aortography was performed in 3 locations, including cranial to the celiac artery, cranial to the renal arteries, and cranial to the caudal (inferior) mesenteric artery, enabling characterization of the visceral branch arteries in all 65 Wistar rats. Selective arteriography of first-, second-, and third-order branch vessels of the aorta was performed allowing characterization of normal and variant anatomy. Dedicated selective arteriography was performed of the celiac artery in 65 Wistar and 10 Sprague-Dawley rats, of the common hepatic artery in 65 Wistar and 50 Sprague-Dawley rats, and of the cranial mesenteric artery in 43 Wistar rats. MR imaging enabled correlation with the lobar and portal venous anatomy.
CONCLUSIONS
Analysis of arteriography and MR imaging in these rat models will provide translational researchers with anatomic details needed to develop new endovascular protocols for small animal research in interventional radiology.
Topics: Angiography, Digital Subtraction; Animals; Aorta; Aortography; Celiac Artery; Magnetic Resonance Angiography; Male; Models, Animal; Portal Vein; Predictive Value of Tests; Rats, Sprague-Dawley; Rats, Wistar; Retrospective Studies; Translational Research, Biomedical; Viscera
PubMed: 31202678
DOI: 10.1016/j.jvir.2019.03.005 -
Circulation Journal : Official Journal... Apr 2022
Topics: Angiography; Contrast Media; Coronary Angiography; Female; Humans; Male; Renal Insufficiency, Chronic
PubMed: 35354716
DOI: 10.1253/circj.CJ-22-0141 -
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 -
Optics Letters Oct 2022A fast and practical computational cross-calibration of multiple spectrometers is described. A signal correlation matrix (CM) can be constructed from paired B-scans in a...
A fast and practical computational cross-calibration of multiple spectrometers is described. A signal correlation matrix (CM) can be constructed from paired B-scans in a multiple-spectrometer optical coherence tomography (OCT), where the wavelength-corresponding pixels are indicated by high cross correlation. The CM can be used to either guide the physical alignment of spectrometers or to numerically match the spectra in the post-process. The performance is comparable to the previously reported optimization approach, as demonstrated by the mirror tests, qualitative comparison of OCT and optical coherence tomography angiography (OCTA) images, and quantitative comparison of image metrics.
Topics: Angiography; Calibration; Fluorescein Angiography; Refractometry; Tomography, Optical Coherence
PubMed: 36181195
DOI: 10.1364/OL.468707 -
The Veterinary Clinics of North... May 2022As part of the cardiovascular examination, all birds underwent clinical and echocardiographic examinations. Radiographs and blood samples were taken. Each bird was... (Review)
Review
As part of the cardiovascular examination, all birds underwent clinical and echocardiographic examinations. Radiographs and blood samples were taken. Each bird was premedicated with midazolam and medetomidin and anesthetized with inhalation anesthesia using isoflurane. We performed computed tomographic angiography (CTA) after intravenous injection of 1 to 2 mL contrast agent per kg followed by a 1 mL saline solution flush. We were been able to identify the arteries that previous studies revealed to be most likely affected by atherosclerotic lesions: the aorta, both pulmonary arteries, and both brachiocephalic trunks. CTA was safe and is of potential diagnostic value in birds.
Topics: Angiography; Animals; Birds; Contrast Media; Tomography, X-Ray Computed
PubMed: 35422261
DOI: 10.1016/j.cvex.2022.01.008 -
Journal of Vascular and Interventional... Aug 2022To evaluate the role of computed tomography (CT) and CT angiography in guiding endovascular arteriography (EA) and embolization in hemodynamically (HD) stable and...
PURPOSE
To evaluate the role of computed tomography (CT) and CT angiography in guiding endovascular arteriography (EA) and embolization in hemodynamically (HD) stable and unstable patients with abdominal and/or pelvic (AP) trauma.
MATERIALS AND METHODS
A retrospective review was performed of patients with AP trauma who underwent EA with or without embolization (from January 2012 to August 2020) at an urban, level I trauma center. Patients aged <18 years or those undergoing EA outside of the abdomen and/or pelvis were excluded. Demographics, imaging findings, procedure length, contrast agent administration, laboratory values, and outcomes were compared on the basis of preprocedural imaging technique and hemodynamic status.
RESULTS
A total of 190 patients with AP trauma underwent EA with or without embolization; among them, 123 were HD stable and underwent CT/CT angiography, whereas 67 were initially HD unstable and underwent operative management prior to EA. Of these patients, 38 underwent CT/CT angiography after hemodynamic stability was achieved prior to postoperative EA. The incidence of therapeutic embolization for arterial injury on EA was significantly higher in patients with preprocedural CT/CT angiography (65.8% vs 44.8%, P = .04). The positive and negative predictive values of CT angiography for arterial injury at the time of EA were 92.3% and 100%, respectively. Prior imaging was associated with a reduced contrast agent requirement at the time of EA and reduced transfusion requirement (P = .05 and P = .02). No significant differences were observed in adverse outcomes for patients undergoing preprocedural imaging.
CONCLUSIONS
CT or CT angiography prior to EA for HD stable and unstable patients with AP trauma may improve the likelihood of therapeutic embolization and enable improved procedure metrics without increasing adverse outcomes.
Topics: Abdominal Injuries; Angiography; Contrast Media; Embolization, Therapeutic; Humans; Pelvic Bones; Retrospective Studies; Tomography, X-Ray Computed
PubMed: 35598852
DOI: 10.1016/j.jvir.2022.05.006 -
Neuroimaging Clinics of North America May 2024Conventional imaging modalities, such as computed tomography angiography, MR angiography, transcranial Doppler ultrasonography, and digital subtraction angiography, are... (Review)
Review
Conventional imaging modalities, such as computed tomography angiography, MR angiography, transcranial Doppler ultrasonography, and digital subtraction angiography, are utilized in evaluating intraluminal or intravascular pathology of the intracranial vessels. Limitations of luminal imaging techniques can lead to inaccurate diagnosis, evaluation, and risk stratification, as many cerebrovascular pathologies contain an extrinsic vessel wall component. Furthermore, vessel wall imaging can provide information regarding extent, treatment response, and biopsy targets for vasculitis cases. Overall, while vessel wall imaging can provide robust data regarding intracranial pathologies, further prospective, multicenter studies are required to improve diagnostic application and accuracy.
Topics: Humans; Vasculitis; Magnetic Resonance Angiography; Atherosclerosis; Tomography, X-Ray Computed; Angiography, Digital Subtraction; Magnetic Resonance Imaging
PubMed: 38604709
DOI: 10.1016/j.nic.2024.02.001 -
Sichuan Da Xue Xue Bao. Yi Xue Ban =... May 2022To evaluate the safety and effectiveness of transcatheter arterial embolization (TAE) in the treatment of acute non-variceal upper gastrointestinal bleeding (ANVUGIB),...
OBJECTIVE
To evaluate the safety and effectiveness of transcatheter arterial embolization (TAE) in the treatment of acute non-variceal upper gastrointestinal bleeding (ANVUGIB), and to guide clinical practice and continue to optimize diagnosis and treatment strategies.
METHODS
This retrospective study included 266 patients who underwent angiography due to ANVUGIB between March 2016 and March 2021. Data on the positive rate of angiography, the technical success rate and clinical success rate of TAE, and the rebleeding rate and the all-cause mortality within 30 days after TAE treatment were collected, and the influencing factors relevant to the above events were analyzed accordingly.
RESULTS
All 266 patients completed angiography--the positive rate of angiography was 54.1% (144/266), the total technical success rate was 97.3% (217/223), the clinical success rate was 73.1% (155/212), and the rebleeding rate and all-cause mortality within 30 days were 26.9% (57/212) and 16.1% (35/217), respectively. This study found that shock index>1 ( =5.950; 95% : 1.481-23.895; =0.012), computed tomography angiography (CTA) positive result ( =6.813; 95% : 1.643-28.252; =0.008) and interval<24 h ( =10.530; 95% : 2.845-38.976; <0.001) were independent predictors of positive angiography. Shock index>1 ( =2.544; 95% : 1.301-4.972; =0.006) and INR>1.5 ( =3.207; 95% : 1.381-7.451; =0.007) were independent risk factors for rebleeding. Patients with postoperative bleeding ( =3.174; 95% : 1.164-8.654; =0.024) and patients with rebleeding after embolization ( =34.665; 95% : 11.471-104.758; <0.001) had a higher risk of death within 30 days.
CONCLUSION
TAE is safe and effective in the treatment of ANVUGIB. Patients with shock index>1 and positive CTA are more likely to be angiographic positive, and should undergo angiography as early as possible after bleeding. In addition, rebleeding after embolization deserves high attention.
Topics: Acute Disease; Angiography; Embolization, Therapeutic; Gastrointestinal Hemorrhage; Humans; Retrospective Studies; Treatment Outcome
PubMed: 35642145
DOI: 10.12182/20220560203 -
Interventional Neuroradiology : Journal... Jun 2024Pure arterial malformations (PAMs) are rare vascular lesions often detected incidentally on brain imaging. They are characterised by a mass of arterial loops containing...
Pure arterial malformations (PAMs) are rare vascular lesions often detected incidentally on brain imaging. They are characterised by a mass of arterial loops containing arteries that are tortuous, overlapping and dilated without any associated arteriovenous shunting. The incidence of PAMs have been rising due to the increasing use of non-invasive angiographic imaging for the diagnosis of neurovascular disorders. This article will present the clinical course of two cases of PAM, both of which demonstrated a stable appearance on surveillance imaging despite the lack of surgical or endovascular intervention.
Topics: Humans; Cerebral Angiography; Female; Male; Adult; Angiography, Digital Subtraction; Magnetic Resonance Angiography; Intracranial Arteriovenous Malformations; Middle Aged; Magnetic Resonance Imaging
PubMed: 35892156
DOI: 10.1177/15910199221116006