Field-of-view zoom during a single-shot short-axis image for cardiac contraction correction

Clinical introductionA 71-year-old man, with a history of chronic aortic regurgitation and negative follow-up after bladder cancer resection 10 months before, had an aortic valve surgery. Two months after, a mass near the right side of the heart had been detected by transthoracic echocardiography performed for dyspnoea, without a cough or fever. The quality of ultrasound images did not allow for an appropriate evaluation due to the outcomes of the sternotomy and the presence of calcified pachypleurite. In order to evaluate this finding, coronary CT (CCT) (figure 1A,B) and positron-emission tomography with 2-[18F] fluoro-2-deoxy-D-glucose (FDG-PET) (figure 1C) were performed. Finally, a cardiac magnetic resonance (CMR) was requested (figure 1D–F, see online supplementary videos).Figure 1(A) Short axis image of early contrast enhancement phase coronary CT (CCT); (B) short axis of delayed phase of the same CCT; (C) lesion on positron-emission tomography with 2-[18F] fluoro-2-deoxy-D-glucose image (white arrow); CMR short axis (D) T2-weighted image with fat saturation; (E) T1-weighted image with fat-saturation; (F) T1-weighted image without fat-saturation.QuestionWhich of the following is the most likely diagnosis of the pericardial mass?Primary pericardial tumour.Pericardial metastasis.Intrapericardial abscess.Intrapericardial haematoma.

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Comparison of field-of-view (FOV) optimized and constrained undistorted single shot (FOCUS) with conventional DWI for the evaluation of prostate cancer

Clinical Imaging ◽

10.1016/j.clinimag.2015.03.004 ◽

2015 ◽

Vol 39 (5) ◽

pp. 851-855 ◽

Cited By ~ 12

Author(s):

Zhaoyan Feng ◽

Xiangde Min ◽

Vivek Kumar Sah ◽

Liang Li ◽

Jie Cai ◽

...

Keyword(s):

Prostate Cancer ◽

Field Of View ◽

Single Shot

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Comparison of Field-of-view Optimized and Constrained Undistorted Single Shot With Conventional Intravoxel Incoherent Motion Diffusion-Weighted Imaging for Measurements of Diffusion and Perfusion in Vertebral Bone Marrow

Journal of Computer Assisted Tomography ◽

10.1097/rct.0000000000001111 ◽

2020 ◽

Vol Publish Ahead of Print ◽

Author(s):

Jibin Cao ◽

Jingyi Zhu ◽

Wenge Sun ◽

Lingling Cui

Keyword(s):

Bone Marrow ◽

Diffusion Weighted Imaging ◽

Field Of View ◽

Intravoxel Incoherent Motion ◽

Single Shot ◽

Vertebral Bone ◽

Diffusion Weighted ◽

Vertebral Bone Marrow

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Small Field-of-view single-shot EPI-DWI of the prostate: Evaluation of spatially-tailored two-dimensional radiofrequency excitation pulses

Zeitschrift für Medizinische Physik ◽

10.1016/j.zemedi.2015.06.013 ◽

2016 ◽

Vol 26 (2) ◽

pp. 168-176 ◽

Cited By ~ 16

Author(s):

Ulrike I. Attenberger ◽

Nils Rathmann ◽

Metin Sertdemir ◽

Philipp Riffel ◽

Anja Weidner ◽

...

Keyword(s):

Field Of View ◽

Single Shot ◽

Small Field ◽

Two Dimensional ◽

Small Field Of View

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MDCT Determination of Volume and Function of the Left Ventricle: Are Short-Axis Image Reformations Necessary?

American Journal of Roentgenology ◽

10.2214/ajr.04.1764 ◽

2006 ◽

Vol 186 (6_supplement_2) ◽

pp. S371-S378 ◽

Cited By ~ 29

Author(s):

Kai U. Juergens ◽

Harald Seifarth ◽

David Maintz ◽

Matthias Grude ◽

Murat Ozgun ◽

...

Keyword(s):

Left Ventricle ◽

Short Axis ◽

Short Axis Image ◽

And Function

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CAN WE USE LOW-COST 360 DEGREE CAMERAS TO CREATE ACCURATE 3D MODELS?

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-2-69-2018 ◽

2018 ◽

Vol XLII-2 ◽

pp. 69-75 ◽

Cited By ~ 6

Author(s):

L. Barazzetti ◽

M. Previtali ◽

F. Roncoroni

Keyword(s):

Laser Scanning ◽

Low Cost ◽

Point Clouds ◽

3D Models ◽

Bundle Adjustment ◽

Field Of View ◽

Large Field ◽

Single Shot ◽

New Paradigm ◽

Image Orientation

360 degree cameras capture the whole scene around a photographer in a single shot. Cheap 360 cameras are a new paradigm in photogrammetry. The camera can be pointed to any direction, and the large field of view reduces the number of photographs. This paper aims to show that accurate metric reconstructions can be achieved with affordable sensors (less than 300 euro). The camera used in this work is the Xiaomi Mijia Mi Sphere 360, which has a cost of about 300 USD (January 2018). Experiments demonstrate that millimeter-level accuracy can be obtained during the image orientation and surface reconstruction steps, in which the solution from 360&deg; images was compared to check points measured with a total station and laser scanning point clouds. The paper will summarize some practical rules for image acquisition as well as the importance of ground control points to remove possible deformations of the network during bundle adjustment, especially for long sequences with unfavorable geometry. The generation of orthophotos from images having a 360&deg; field of view (that captures the entire scene around the camera) is discussed. Finally, the paper illustrates some case studies where the use of a 360&deg; camera could be a better choice than a project based on central perspective cameras. Basically, 360&deg; cameras become very useful in the survey of long and narrow spaces, as well as interior areas like small rooms.

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Application of Field-of-View Optimized and Constrained Undistorted Single Shot (FOCUS) with Intravoxel Incoherent Motion (IVIM) in 3T in Locally Advanced Rectal Cancer

Disease Markers ◽

10.1155/2021/5565902 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Yipeng Cheng ◽

Huijie Jiang ◽

Hui Wang ◽

Qingchao Tang ◽

Tianyi Liu

Keyword(s):

Rectal Cancer ◽

Diffusion Coefficient ◽

Roc Curve ◽

Locally Advanced ◽

Tumor Grade ◽

Advanced Rectal Cancer ◽

Locally Advanced Rectal Cancer ◽

Field Of View ◽

Single Shot ◽

Normalized Parameters

Purpose. To evaluate the efficacy of field-of-view (FOV) optimized and constrained undistorted single shot (FOCUS) with IVIM in 3T MRI in the grading of patients with locally advanced rectal cancer. Methods. From January 1st to December 31st, 2019, patients with locally advanced rectal cancer were retrieved. FOCUS DWI and FOCUS IVIM were obtained. Apparent diffusion coefficient (ADC) and IVIM parameters including mean true diffusion coefficient ( D ), pseudodiffusion coefficient associated with blood flow ( D ∗ ), and perfusion fraction ( f ) of the tumor parenchyma and normal rectal wall, as well as the normalized tumor parameters by corresponding normal intestinal wall parameters (ADCNOR, D NOR , D ∗ NOR , and f NOR ), were compared between the well/moderately differentiated and poorly differentiated groups by Student’s t -test. The relationship between the above parameters and the histologic grade was analyzed using Spearman’s correlation test, with the ROC curve generated. Results. Eighty-eight patients (aged 31 to 77 years old, mean = 56 ) were included for analysis. D tumor and f tumor were positively correlated with the tumor grade ( r = 0.483 , p < 0.001 and r = 0.610 , p < 0.001 , respectively). All the normalized parameters (ADCNOR, D NOR , D ∗ NOR , and f NOR ) were positively correlated with the tumor grade ( r = 0.267 , p = 0.007 ; r = 0.564 , p = 0.001 ; r = 0.414 , p = 0.005 ; and r = 0.605 , p < 0.001 , respectively). The best discriminative parameter was the f tumor value, and the area under the ROC curve was 0.927. With a cut-off value of 22.0%, f tumor had a sensitivity of 88.9% and a specificity of 100%. Conclusion. FOCUS IVIM-derived parameters and normalized parameters are useful for predicting the histologic grade in rectal cancer patients.

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