Multiplanar Imaging Research Articles

Image quality assessments in abdominal CT: Relative importance of dose, iterative reconstruction strength and slice thickness

IntroductionLow contrast resolution in abdominal computed tomography (CT) may be negatively affected by attempts to lower patient doses. Iterative reconstruction (IR) algorithms play a key role in mitigating this problem. The reconstructed slice thickness also influences image quality. The aim was to assess the interaction and influence of patient dose, slice thickness, and IR strength on image quality in abdominal CT. MethodWith a simultaneous acquisition, images at 42 and 98 mAs were obtained in 25 patients. Multiplanar images with slice thicknesses of 1, 2, and 3 mm and advanced modeled iterative reconstruction (ADMIRE) strengths of 3 (AD3) and 5 (AD5) were reconstructed. Four radiologists evaluated the images in a pairwise manner based on five image criteria. Ordinal logistic regression with mixed effects was used to evaluate the effect of tube load, ADMIRE strength, and slice thickness using the visual grading regression technique. ResultsFor all assessed image criteria, the regression analysis showed significantly (p < 0.001) higher image quality for AD5, but lower for tube load 42 mAs, and slice thicknesses of 1 mm and 2 mm, compared to the reference categories of AD3, 98 mAs, and 3 mm, respectively. AD5 at 2 mm was superior to AD3 at 3 mm for all image criteria studied. AD5 1 mm produced inferior image quality for liver parenchyma and overall image quality compared to AD3 3 mm. Interobserver agreement (ICC) ranged from 0.874 to 0.920. ConclusionADMIRE 5 at 2 mm slice thickness may allow for further dose reductions due to its superiority when compared to ADMIRE 3 at 3 mm slice thickness. Implications for practiceCombination of thinner slices and higher ADMIRE strength facilitates imaging at low dose.

Quality assessment of expedited AI generated reformatted images for ED acquired CT abdomen and pelvis imaging.

Retrospectively compare image quality, radiologist diagnostic confidence, and time for images to reach PACS for contrast enhanced abdominopelvic CT examinations created on the scanner console by technologists versus those generated automatically by thin-client artificial intelligence (AI) mechanisms. A retrospective PACS search identified adults who underwent an emergency department contrast-enhanced abdominopelvic CT in 07/2022 (Console Cohort) and 07/2023 (Server Cohort). Coronal and sagittal multiplanar reformatted images (MPR) were created by AI software in the Server cohort. Time to completion of MPR images was compared using 2-sample t-tests for all patients in both cohorts. Two radiologists qualitatively assessed image quality and diagnostic confidence on 5-point Likert scales for 50 consecutive examinations from each cohort. Additionally, they assessed for acute abdominopelvic findings. Continuous variables and qualitative scores were compared with the Mann-Whitney U test. A p < .05 indicated statistical significance. Mean[SD] time to exam completion in PACS was 8.7[11.1] minutes in the Console cohort (n = 728) and 4.6[6.6] minutes in the Server cohort (n = 892), p < .001. 50 examinations in the Console Cohort (28 women 22 men, 51[19] years) and Server cohort (27 women 23 men, 57[19] years) were included for radiologist review. Age, sex, CTDlvol, and DLP were not statistically different between the cohorts (all p > .05). There was no significant difference in image quality or diagnostic confidence for either reader when comparing the Console and Server cohorts (all p > .05). Examinations utilizing AI generated MPRs on a thin-client architecture were completed approximately 50% faster than those utilizing reconstructions generated at the console with no statistical difference in diagnostic confidence or image quality.

MRI for endometriosis in adolescent patients.

Endometriosis, a chronic condition that often starts in adolescence, can have a significant impact on quality of life due to symptoms of dysmenorrhea and pelvic pain. Although laparoscopy with direct visualization and pathologic correlation is the reference standard for the diagnosis of endometriosis, some authors have called for a greater emphasis on clinical diagnosis - including imaging. Magnetic resonance imaging (MRI) provides highly reproducible, large field of view, multiplanar, and multiparametric imaging of pelvic endometriosis and is well tolerated in adolescent patients. As such, pediatric radiologists need to be familiar with the manifestations of endometriosis on MRI and how these findings may differ from those seen in adult populations.

Prevalence of pneumatisation patterns of Onodi cells among the North-East Indian population

BackgroundThe posterior ethmoid sinuses have a complex anatomy and a highly variable normal structure. The posterior ethmoid Onodi cell needs careful assessment because of its proximity to the optic nerve and the internal carotid artery canal. Recognising the distinctions is essential for optimal pre-op preparation. Sphenoid sinus surgery can now be performed without worrying about compromising vital structures like the internal carotid artery or optic nerve. Preoperative radiological assessment is a quick and easy way to check for ethmoid cell pneumatisation differences.Aim and objectivesTo determine the pneumatisation patterns of Onodi cells among the North-East Indian population using 16-slice multidetector computed tomography (MDCT).ResultsNine-hundred MDCT paranasal sinuses were analysed over a period of 0–2 years, out of which 220 cases showed the presence of Onodi cell. Type I were 89 cases (40.45%, CI 32.00–48.90), Type II were 128 cases (58.18%, CI 49.72–66.63), and 3 cases with Type III cell (1.36%, CI 0.18–2.54).ConclusionThe most prevalent pneumatisation pattern is Type II. The pneumatisation patterns of Onodi cells can be best detected and evaluated by multiplanar MDCT imaging. Sinus surgeons need a firm grasp of pneumatisation patterns to avoid damaging the optic nerve and internal carotid artery canal during operations.

Frequency of bile duct variant anatomy on MRCP on 3.0t in liver donors.

Objective: To determine the frequency of bile duct variant using magnetic resonance cholangiopancreatography (MRCP) on a magnetic field strength of 3.0 Tesla in liver donors. Study Design: Descriptive Cross-sectional study. Setting: Department of Radiology, Armed Forces Institute of Radiology and Imaging, Military Hospital Rawalpindi. Period: May 2019 to November 2019. Methods: The research comprised people who went to the hospital for magnetic resonance cholangiopancreatography. 85 liver transplant recipients between the ages of 20 and 70 were chosen for the research. According to Yoshida categorization, bile duct variation was noted. The MRCP methodology includes multiplanar imaging, maximum intensity projection pictures, thin slab axial HASTE, thick slab coronal HASTE, and T2 3D sequence. The Siemens Avanto 3 Tesla machine was used for the study. Results: The study's participants ranged in age from 20 to 70, with a mean age of 41.73 ± 10.03 years. The majority of the 54 patients (63.53 percent) were aged 20 to 45. The male to female ratio was 1:1 among the 85 patients, with 43 (50.59 percent) men and 42 (49.41 percent) women. In my research of liver donors, 57 (67.05 percent) showed normal biliary tree structure and 28 (32.95 percent) exhibited abnormalities. Conclusion: This study concluded that normal biliary tree anatomy was seen in 67.05% and 32.95% had variations in biliary anatomy on MRCP on 3.0T in liver donors.

Skeletal computed tomography findings of upper extremities in middle-aged persons with thalidomide embryopathy.

Individuals with thalidomide embryopathy are now approximately 60 years old. For years, they have been compensating for their hypoplastic limbs in various aspects of daily living, and they face secondary problems such as limb and back pain. Imaging analysis is beneficial for understanding the pathogenesis of these problems. However, previous studies on skeletal imaging were mainly radiographic studies conducted at young ages, and there are few studies on skeletal imaging after aging, with most of them being case reports. In this study, detailed analyses of the skeletons of the upper extremities were performed using three-dimensional computed tomography and multiplanar reconstruction images in five individuals with thalidomide embryopathy aged approximately 60 years. Each individual frequently complained of neck, shoulder, and/or back pain. Dislocation, subluxation, and osteoarthritis were observed in the shoulder joints in some individuals. Hypoplasia of the trochlea and/or capitulum of the humerus, coronoid fossa, olecranon, and coronoid processes was observed in the elbow joints. Fusion and hypoplasia of the carpal bones were frequently observed in wrist joints. Radiocarpal and ulnocarpal synostoses were also observed. The joint instability and osteoarthritis found in this study may have contribute to upper limb pain in individuals with thalidomide embryopathy.

DOES TOTAL HIP ARTHROPLASTY BENEFIT PATIENTS WITH MINIMAL RADIOLOGICAL OSTEOARTHRITIS?

There is some evidence to suggest that outcomes of THA in patients with minimal radiographic osteoarthritis may not be associated with predictable outcomes. The aim of this study was to:Assess the outcome of patients with hip pain who underwent THA with no or minimal radiographic signs of osteoarthritis,Identify patient comorbidities and multiplanar imaging findings which are predictive of outcome,Compare the outcome in these patients to the expected outcome of THA in hip OA.A retrospective review of 107 hips (102 patients, 90F:12M, median age 40.6, IQR 35.1–45.8 years, range 18–73) were included for analysis. Plain radiographs were evaluated using the Tonnis grading scale of hip OA. Outcome measures were all-cause revision; iHOT12; EQ-5D; Oxford Hip Score; UCLA Activity Scale; and whether THA had resulted in the patient's hip pain and function being Better/Same/Worse.The median Oxford Hip Score was 33.3 (IQR 13.9, range 13–48), and 36/107 (33.6%) hips achieved an OHS≥42. There was no association between primary hip diagnosis and post-operative PROMs. A total of 91 of the 102 patients (89.2%, 93 hips) reported that their hip pain and function was Better than prior to THA and would have the surgery again, 7 patients (6.8%, 10 hips) felt the Same, and 4 patients (3.9%, 4 hips) felt Worse and would not have the surgery again.Younger patients undergoing total hip arthroplasty with no or minimal radiographic osteoarthritis had lower postoperative Oxford Hip Scores than the general population; though most felt symptomatically better and knowing what they know now, would have surgery again. Those with chronic pain syndrome or hypermobility were likely to benefit less. Those with subchondral cysts or joint space narrowing on CT imaging were more likely to achieve higher functional scores and satisfaction.

Age-related changes in mitral annular disjunction: A retrospective analysis using enhanced cardiac CT

AimsThe current recognition of mitral annular disjunction (MAD) as an anatomical abnormality potentially associated with ventricular arrhythmias has sparked controversy regarding its prevalence and clinical implications. This study aimed to investigate the prevalence and extent of MAD in individuals with no significant structural abnormalities involving the left heart using enhanced cardiac CT, while also exploring potential factors, such as age, that may be associated with MAD. MethodsSystolic datasets of cardiac CT from 742 subjects were retrospectively included. MAD was determined by rotating orthogonal multiplanar reconstruction images around the central axis of the mitral annulus. The maximal distance of disjunction (DMAD) and segments involved (SI, 0 to 5 basal segments at left ventricular wall) was quantified to evaluate the extent of separation. ResultsIn total, 449 (60.5%) had MAD. Subjects with MAD were significantly older (51.3 ± 19.9 years vs. 29.6 ± 20.3 years, P < 0.001). Age was found to be an independent relevant factor for MAD (OR = 1.059; 95%CI: 1.033, 1.085; P < 0.001). Subjects with MAD were then divided into 4 subgroups (G1: ≤20 years, G2: 21–40 years, G3: 41–60 years, G4: ≥61 years). DMAD and SI of each age subgroup were 1.9 ± 0.2 mm, 2.0 ± 1.2 (G1, n = 36), 2.7 ± 0.8 mm, 2.9 ± 1.3 (G2, n = 51), 3.0 ± 0.8 mm, 3.0 ± 1.3 (G3, n = 183), and 3.0 ± 1.0 mm, 3.7 ± 1.1 (G4, n = 179). Age was an independent relevant factor associated with DMAD (R2 = 0.132; β = 0.014; 95%CI: 0.004, 0.024; P = 0.007) and SI (OR = 1.030; 95%CI: 1.005, 1.055; P = 0.016). ConclusionsMAD is a common finding on cardiac CT. Its prevalence and extent increase with age.

Assessing the relationship of agger nasi pneumatization to the lacrimal sac: a dynamic computed tomography-dacryocystography analysis.

An understanding of the anatomical structure is crucial for completing successful endoscopic dacryocystorhinostomy (DCR) surgery. This study aimed to precisely delineate the spatial relationship between the lacrimal sac and the agger nasi cell (ANC) and evaluate the impact of ANC on surgical strategies in endoscopic DCR. This retrospective cross-sectional study included 110 Han Chinese patients diagnosed with unilateral primary acquired nasolacrimal duct obstruction (PANDO) from January 2021 to June 2023. This study was conducted in Eye, Ear, Nose, and Throat Hospital of Fudan University and involved inpatient participants who were scheduled for DCR surgery under general anesthesia. Patients were consecutively enrolled. The patients underwent preoperative computed tomography-dacryocystography (CT-DCG), and contrast-enhanced images were used to locate the positions of the lacrimal sac and the common canaliculus. A dynamic approach was adopted to analyze the multiplanar CT imaging, facilitating a detailed assessment of the morphology of the lacrimal drainage system and potential overlap of the lacrimal sac. Patient ages and measured values are presented as the mean ± standard deviation, which were measured three times by the same observer and averaged for statistical analysis. The prevalence of ANC in this study was 90.9% (100/110). Dynamic examination revealed that only 42.7% (47/110) of ANCs appeared as discrete cells, while the majority were connected to nearby sinus openings. Spatial analysis showed that in 57 out of 110 cases, ANCs were situated below the common canaliculus and not posterior to the lacrimal sac, indicating an overlap rate of 51.8%. Notably, our dynamic approach identified five critical cases of overlap below the level of the common canaliculus, which might have been missed by prior studies that used different methodologies. More than half of the ANCs exhibited overlap with the lacrimal sac, suggesting a significant proportion may necessitate opening during endoscopic DCR procedures. ANCs are often interconnected with adjacent nasal sinuses, necessitating careful consideration in the decision to open the ANCs during surgery. The dynamic evaluation employed in CT-DCG effectively assessed the extent of ANC coverage over the lacrimal sac.

Giant Eustachian Valve Mimicking an Inter-atrial Septal Defect

A 68-year-old woman presented with dyspnoea attributed to acute pulmonary oedema. Due to an audible diastolic murmur, a transthoracic and transoesophageal echocardiogram (TEE) was performed revealing severe rheumatic mitral stenosis and regurgitation. Although initial assessment of the interatrial septum did not reveal any atrial septal defects, upon TEE evaluation using a 112° window, an interatrial defect was seen, with turbulent flow seen through this. However, using multiplanar imaging, a separate elongated Eustachian valve was shown to be mimicking an ‘arm’ of the interatrial septum and giving rise to the illusion of a defect. The Eustachian valve is a congenital remnant which often regresses at birth but can exist as an elongated structure originating from the inferior portion of the right atrium and may appear as an atrial septal defect. By employing multiplanar imaging on TEE, we were able to systematically discern the reason behind the apparent defect and avoid further delays to the patient’s care.

Magnification of a multi-focus infinity corrected microscope

The problem of image magnification in a bright field multi-focus imaging microscope is discussed. Such microscope allows simultaneous observation of two objects axially separated by a distance that exceeds the depth-of-field of the microscope, so-called multi-planar imaging. It is shown that the tunable lens required for operation of the microscope can be used in constant magnification imaging in the single focus regime, but not in multi-focus. Additionally, it is presented that the microscope allows for multi-planar imaging with satisfactory quality with a selected magnification of the image of one of the two objects. While the microscope uses a thermal lens as the tunable lens, the scheme of the optical setup needed to achieve the desired operation of the microscope is universal and applies to all kinds of tunable lenses used in microscopy.

A prospective observational study on magnetic resonance imaging (MRI) based evaluation of pelvic masses in females in tertiary care hospital in central India

Background Pelvic masses in females often present a diagnostic challenge, necessitating accurate detection and characterization for appropriate clinical management. Magnetic Resonance Imaging (MRI) has emerged as a valuable tool in pelvic mass evaluation, offering superior soft tissue contrast and multiplanar imaging capabilities. This prospective observational study aims to assess the diagnostic accuracy of pelvic MRI, determine anatomic origin, classify masses, estimate local spread, and evaluate the impact of gadolinium contrast in a tertiary care hospital in Central India. Methods The study will be conducted over a two-year period, enrolling female patients with lower back pain and clinical suspicion or inconclusive ultrasonographic findings of pelvic masses. A systematic approach to participant identification, recruitment, and engagement will be employed, with both verbal and written informed consent obtained. The imaging protocol will involve T1 and T2 weighted images, and gadolinium contrast administration when necessary. Data collection will encompass demographic information, medical history, clinical details, and MRI findings. Statistical analyses, including sensitivity, specificity, prevalence estimates, and regression analyses, will be performed to evaluate the diagnostic accuracy of pelvic MRI. Expected outcome We anticipate that pelvic MRI will exhibit high diagnostic accuracy in detecting and characterizing pelvic masses, providing valuable information on anatomic origin and pelvic compartment localization. The study aims to contribute evidence on the impact of gadolinium contrast in enhancing diagnostic capabilities. The findings are expected to optimize clinical decision-making for effective management of females with pelvic masses, leading to timely interventions and improved patient outcomes.

Reliability of glenoid measurements performed using Multiplanar Reconstruction (MPR) of Magnetic Resonance (MRI) in patients with shoulder instability

PurposeMeasurement of glenoid bone loss in the shoulder instability can be assessed by CT or MRI multiplanar imaging and is crucial for pre-operative planning. The aim of this study is to determine the intra and interobserver reliability of glenoid deficiency measurement using MRI multiplanar reconstruction with 2D assessment in the sagittal plane (MPR MRI).MethodsWe reviewed MRI images of 80 patients with anterior shoulder instability with Osirix software using MPR. Six observers with basic experience measured the glenoid, erosion edge length, and bone loss twice, with at least one-week interval between measurements. We calculated reliability and repeatability using the intra-class correlation coefficient (ICC) and minimal detectable change with 95% confidence (MDC95%).ResultsIntra and Inter-observer ICC and MDC95% for glenoid width and height were excellent (ICC 0,89-0,96). For erosion edge length and area of the glenoid were acceptable/good (ICC 0,61-0,89). Bone loss and Pico Index were associated with acceptable/good ICC (0,63 -0,86)) but poor MDC95% (45 - 84 %). Intra-observer reliability improved with time, while inter-observer remained unchanged.ConclusionThe MPR MRI measurement of the anterior glenoid lesion is very good tool for linear parameters. This method is not valid for Pico index measurement, as the area of bone loss is variable. The pace of learning is individual, therefore complex calculations based on MPR MRI are not resistant to low experience as opposed to true 3D CT

On‐Chip‐Driven Multicolor 3D Meta‐Display

AbstractIntegrating metasurfaces on‐chip provides a promising approach to modulating and extracting the in‐plane waves, which bridges the conversion between guided and free‐space waves and suggests tremendous applications, including guided‐wave‐driven holography, photonic integrated lasers, and on‐chip routers. However, despite these efforts, it remains challenging to achieve multicolor 3D holographic projections via on‐chip meta‐optics, along with switchability. Here, the multicolor 3D holography free from zero‐order diffraction and the immersion switchable display enabled by the on‐chip integrated metasurface is proposed and demonstrated. By leveraging the propagation‐accumulated phase of the guided waves and exploiting an optimization algorithm, an on‐chip meta‐hologram driven by guided waves is developed to project both multicolor and multiplane images with independent encoding freedom. Moreover, the switch between two colorful holographic images is also demonstrated via an easily accessible immersion tuning scheme. Such an on‐chip‐driven meta‐hologram exhibits low background noise or crosstalk with high information quality and is also free from sophisticated nanostructure searching or elaborate target‐image predesigning. The proposed on‐chip‐driven metasurface for multicolor 3D holography promises future applications in dynamic display, virtual/augmented reality, and liquid sensing.

Unveiling the Integral Role of Magnetic Resonance Imaging in the Comprehensive Evaluation and Diagnosis of Spinal Dysraphism.

Background Spinal dysraphism, characterized by incomplete closure of neural and bone spinal structures, manifests as congenital fusion abnormalities along the dorsal midline, involving the skin, subcutaneous tissue, meninges, vertebrae, and neural tissue. Magnetic resonance imaging (MRI), the preferred imaging modality for assessing spinal dysraphism across all age groups, provides direct visualization of the spinal cord without the need for contrast or ionizing radiation while also eliminating bone artifacts and allowing multiplanar imaging. The objective of this study was to evaluate the range of spinal dysraphism lesions and assess the significance of MRI in their evaluation. Methodology Thirty patients with suspected spinal dysraphism underwent evaluation at the Medical College Hospital and Study Centre in Vijayapur, India. This cross-sectional observational study included patients diagnosed or provisionally diagnosed with spinal dysraphism based on clinical and imaging profiles. Cases were identified through preliminary findings on radiographs. Results The study encompassed individuals aged one month to 20 years, with the largest proportion of patients (36.67%) falling within the 1-5-year age group. Spina bifida was the most prevalent spinal abnormality, accounting for 70% of cases. In 12 patients (40%), the most prevalent location of involvement was the lumbosacral spine. Conclusion MRI provides excellent tissue differentiation, particularly of lipomatous tissue, with reproducible and comprehensive section planes and relative operator independence. Moreover, MRI is beneficial for children with suspected spinal dysraphism as it can be performed without ionizing radiation, biological risks, or the need for intrathecal contrast media.

Modified double-pulley fixation provides better reduction of bone fragments and union compared to single-point fixation in bony Bankart lesions.

The purpose of this study was to compare clinical scores and imaging outcomes of bony Bankart lesions that underwent single-point and modified double-pulley fixation after at least 2 years of follow-up. Patients who underwent surgery to treat bony Bankart injuries were included and divided into groups A and B. A total of 69 patients were included (32 in group A and 37 in group B). Patients in group A underwent arthroscopic modified double-pulley fixation and patients in group B underwent arthroscopic single-point fixation. Three-dimensional computed tomography (3D-CT) was used to assess glenoid reduction one day after surgery. Postoperative bony union was assessed using 3D-CT and multiplanar reconstruction images 6 months after surgery. Constant-Murley, Rowe rating system, visual analogue scale and University of California at Los Angeles and American Shoulder and Elbow Surgeons scores were recorded before and after surgery. In terms of imaging measurements, there was no significant group difference in the preoperative size of the glenoid defect, the size of the bony fragment or the expected postoperative size of the glenoid defect. The sizes of the actual postoperative glenoid defects differed significantly between the groups (p = 0.027), as did the absolute difference between the expected and actual glenoid defect sizes (p < 0.001). At 6 months postoperatively, 50.0% of group A patients and 24.3% of group B patients exhibited complete bony union (p = 0.027); the rates of partial union were 37.5% and 56.8%, respectively. At the final follow-up, all clinical scores were significantly better than the preoperative scores (all p < 0.05), with no significant group differences (not significant). The use of the modified double-pulley technique with two anchors to treat bony Bankart injuries provides a better reduction of bone fragments than single-point fixation with two anchors and was associated with a higher rate of early bone union. Level III.

Producing focused extreme ultraviolet vortex with Fermat-spiral photon sieves

Extreme ultraviolet (EUV) light is difficult to focus due to strong absorption of most materials. Photon sieves (PS), rather than Fresnel zone plates (FZP), can focus EUV to smaller spot and suppress the higher orders of secondary maxima by several orders of magnitude. The number of pinholes used in PS is far more than that of transparent rings used in FZP, providing a great flexibility to manipulate structured focusing in EUV. In this work we investigate the Fermat-spiral PS to produce focused vortices with different topological charges. Experiment at the wavelength of 46.9 nm is carried out and multi-planar coherent diffractive imaging is used to retrieve the phase map of the focused EUV vortices. These results show the enormous potential of PS for manipulating EUV light. This study not only provides a compact, affordable substitute to focusing vortices where transmissive optics materials are unavailable, but also provides a route of converting various complex light manipulation ranging from visible light to EUV and soft x-ray.

Computed tomography multi-planar and 3D image assessment protocol for detailed analysis of inner ear malformations in patients undergoing cochlear implantation counseling.

&lt;b&gt;&lt;br&gt;Introduction:&lt;/b&gt; Congenital inner ear malformations resulting from embryogenesis may be visualized in radiological scans. Many attempts have been made to describe and classify the defects of the inner ear based on anatomical and radiological findings.&lt;/br&gt; &lt;b&gt;&lt;br&gt;Aim:&lt;/b&gt; The aim was to propose and discuss computed tomography multi-planar and 3D image assessment protocols for detailed analysis of inner ear malformations in patients undergoing cochlear implantation counseling.&lt;/br&gt; &lt;b&gt;&lt;br&gt;Material and methods:&lt;/b&gt; A retrospective analysis of 22 malformed inner ears. CT scans were analyzed using the Multi-Planar Reconstruction (MPR) option and 3D reconstruction.&lt;/br&gt; &lt;b&gt;&lt;br&gt;Results:&lt;/b&gt; The protocol of image interpretation was developed to allow reproducibility for evaluating each set of images. The following malformations were identified: common cavity, cochlear hypoplasia type II, III, and IV, incomplete partition type II and III, and various combinations of vestibule labyrinth malformations. All anomalies have been presented and highlighted in figures with appropriate descriptions for easier identification. Figures of normal inner ears were also included for comparison. 3D reconstructions for each malformation were presented, adding clinical value to the detailed analysis.&lt;/br&gt; &lt;b&gt;&lt;br&gt;Conclusions:&lt;/b&gt; Properly analyzing CT scans in cochlear implantation counseling is a necessary and beneficial tool for appropriate candidate selection and preparation for surgery. As proposed in this study, the unified scans evaluation scheme simplifies the identification of malformations and reduces the risk of omitting particular anomalies. Multi-planar assessment of scans provides most of the necessary details. The 3D reconstruction technique is valuable in addition to diagnostics influencing the decision-making process. It can minimize the risk of misdiagnosis. Disclosure of the inner ear defect and its precise imaging provides detailed anatomical knowledge of each ear, enabling the selection of the appropriate cochlear implant electrode and the optimal surgical technique.&lt;/br&gt.

Stereo Vision Conversion from Planar Videos Based on Temporal Multiplane Images

With the rapid development of 3D movie and light-field displays, there is a growing demand for stereo videos. However, generating high-quality stereo videos from planar videos remains a challenging task. Traditional depth-image-based rendering techniques struggle to effectively handle the problem of occlusion exposure, which occurs when the occluded contents become visible in other views. Recently, the single-view multiplane images (MPI) representation has shown promising performance for planar video stereoscopy. However, the MPI still lacks real details that are occluded in the current frame, resulting in blurry artifacts in occlusion exposure regions. In fact, planar videos can leverage complementary information from adjacent frames to predict a more complete scene representation for the current frame. Therefore, this paper extends the MPI from still frames to the temporal domain, introducing the temporal MPI (TMPI). By extracting complementary information from adjacent frames based on optical flow guidance, obscured regions in the current frame can be effectively repaired. Additionally, a new module called masked optical flow warping (MOFW) is introduced to improve the propagation of pixels along optical flow trajectories. Experimental results demonstrate that the proposed method can generate high-quality stereoscopic or light-field videos from a single view and reproduce better occluded details than other state-of-the-art (SOTA) methods. https://github.com/Dio3ding/TMPI

Clinical physiology: the crucial role of MRI in evaluation of peripheral artery disease.

Peripheral artery disease (PAD) is a common vascular disease that primarily affects the lower limbs and is defined by the constriction or blockage of peripheral arteries and may involve microvascular dysfunction and tissue injury. Patients with diabetes have more prominent disease of microcirculation and develop peripheral neuropathy, autonomic dysfunction, and medial vascular calcification. Early and accurate diagnosis of PAD and disease characterization are essential for personalized management and therapy planning. Magnetic resonance imaging (MRI) provides excellent soft tissue contrast and multiplanar imaging capabilities and is useful as a noninvasive imaging tool in the comprehensive physiological assessment of PAD. This review provides an overview of the current state of the art of MRI in the evaluation and characterization of PAD, including an analysis of the many applicable MR imaging techniques, describing the advantages and disadvantages of each approach. We also present recent developments, future clinical applications, and future MRI directions in assessing PAD. The development of new MR imaging technologies and applications in preclinical models with translation to clinical research holds considerable potential for improving the understanding of the pathophysiology of PAD and clinical applications for improving diagnostic precision, risk stratification, and treatment outcomes in patients with PAD.