The First Application of a Gd3Al2Ga3O12:Ce Single-Crystal Scintillator to Neutron Radiography

Neutron radiography is regarded as complementary to X-ray radiography in terms of transmittance through materials, but its spatial resolution is still insufficient. In order to achieve higher resolution in neutron imaging, several approaches have been adopted, such as optical magnification and event centroiding. In this paper, the authors focused on modification of the scintillator. A Gd3Al2Ga3O12:Ce single-crystal scintillator was applied to neutron radiography for the first time and a spatial resolution of 10.5 μm was achieved. The results indicate that this material can be a powerful candidate for a new neutron scintillator providing a resolution in micrometer order by optimizing the optical system and increasing the scintillator luminosity.

Tenosynovial giant cell tumor of the tendon sheat

The review article outlines modern aspects of the nomenclature, etiopathogenesis, diagnosis and treatment of tenosynovial giant cell tumor of the tendon sheath. This is the second most common benign neoplasm of the hand. Non-radical surgical treatment of this disease leads to a large number of recurrence. To avoid tumor recurrence, surgeon must to have the basics of plastic reconstructive surgery, use delicate instruments and optical magnification. In some cases, adjuvant radiation therapy and administration of tyrosine kinase inhibitors may be required.

Utility of the narrow-band imaging international colorectal endoscopic classification for optical diagnosis of colorectal polyp histology in clinical practice: a retrospective study

Background Narrow-band imaging (NBI) highlights the surface structures and vessels of colorectal polyps and is useful for determining the polyp histology. The narrow-band imaging international colorectal endoscopic (NICE) classification is a diagnostic tool for determining colorectal polyp histology based on NBI without optical magnification. In this study, we aimed to investigate the value of each type of the NICE classification for determining colorectal polyp histology using endoscopy data accumulated in a clinical setting. Methods Endoscopy data for 534 colorectal polyps (316 patients) treated at our facility were retrospectively analyzed. First, we investigated the diagnostic performance of each type of the NICE classification for the optical diagnosis of colorectal polyp histology. The procedures were performed by experienced endoscopists using high-definition colonoscopy without optical magnification. Second, inter-observer and intra-observer agreements were assessed after providing experts and non-experts with a short lecture on the NICE classification. Using 50 fine NBI images of colorectal polyps without optical magnification, the inter-observer and intra-observer agreements between five experts and five non-experts were assessed. Results The sensitivity, specificity, and accuracy values were 86.0%, 99.6%, and 98.5% for NICE type 1 lesions; 99.2%, 85.2%, and 97.8% for NICE type 2 lesions; and 81.8%, 99.6%, and 99.3% for NICE type 3 lesions, respectively. The inter-observer and intra-observer agreements ranged from substantial to excellent for both experts and non-experts. Conclusions The NICE classification had good diagnostic ability in terms of determining the polyp histology and demonstrated a high level of reproducibility among experts and non-experts. Thus, the NICE classification is a useful clinical tool that can be used without optical magnification.

Macro photography with Lighsheet Illumination Enables Whole Expanded Brain Imaging with Single-cell Resolution

Macro photography allows direct visualization of the enlarged whole mouse brain by a combination of lightsheet illumination and expansion microscopy with single-cell resolution. Taking advantage of the long working distance of a camera lens, we imaged a 3.7 cm thick, transparent, fluorescently-labeled expanded brain. In order to improve 3D sectioning capability, we used lightsheet excitation confined as the depth of field of the camera lens. Using 4x sample expansion and 5x optical magnification, macro photography enables imaging of expanded whole mouse brain with an effective resolution of 300 nm, which provides the subcellular structural information at the organ level.

Morden tactic in diagnosis and treatment of early colon cancer (review of literature)

According to the literature review, the use of modern endoscopes with high resolution and a narrow-band imagine function with optical magnification, as well as autofluorescence, chromoscopy, endosonography, makes it possible to establish a diagnosis of early colorectal cancer with a high degree of accuracy. Nowadays, endoscopic submucosal dissection and endoscopic mucosal resection are the methods of choice in the treatment of early (Tis, T1sm1N0M0) colon cancer.

Breast Cancer Image Multi-Classification Using Random Patch Aggregation and Depth-Wise Convolution based Deep-Net Model

Adapting the profound, deep convolutional neural network models for large image classification can result in the layout of network architectures with a large number of learnable parameters and tuning of those varied parameters can considerably grow the complexity of the model. To address this problem a convolutional Deep-Net Model based on the extraction of random patches and enforcing depth-wise convolutions is proposed for training and classification of widely known benchmark Breast Cancer histopathology images. The classification result of these patches is aggregated using majority vote casting in deciding the final image classification type. It has been observed that the proposed Deep-Net model implementation results when compared with classification results of the VGG Net(16 layers) learned features, outclasses in terms of accuracy when applied to breast tumor Histopathology images. The objective of this work is to examine and comprehensively analyze the sub-class classification performance of the proposed model across all optical magnification frontiers.

COMPARATIVE EVALUATION OF MULTIPARAMETRIC ENDORECTAL ULTRASOUND AND ENHANCED IMAGING COLONOSCOPY IN THE DIAGNOSIS OF EARLY COLORECTAL CANCER

AIM: to compare multiparametric endorectal ultrasound (ERUS) and enhanced imaging colonoscopy in the diagnosis of early colorectal cancer.PATIENTS AND METHODS: the study included 78 patients with epithelial rectal tumor. All the patients underwent multiparametric ERUS and colonoscopy with examination by narrow beam imaging (NBI) at optical magnification. All the patients were operated.RESULTS: a morphological examination removed specimens revealed adenomas in 48 cases, in 19 specimens – adenocarcinomas in situ and T1, and in 11 specimens – adenocarcinomas with invasion of the muscle layer or deeper. When calculating the accuracy indicators of diagnostic methods for groups of patients with adenoma, Tis-T1 adenocarcinoma, and T2-T3 adenocarcinoma, the difference in the sensitivity and specificity of the methods in none of the presented groups did not reach the level of statistical significance (p>0.05).ROC analysis showed that ultrasound has a prognostic value comparable to colonoscopy. The area difference was 0.013 (p=0.85).CONCLUSION: endoscopy and ultrasound have similar value in the diagnosis of malignant transformation of rectal adenomas.

Radical Prostatectomy: from Open Surgery towards Robotic Laparoscopy

Radical prostatectomy was first performed more than 100 years ago and has since become the gold standard in treatment of localized prostate cancer. Open surgery has been almost entirely replaced by robotic operations referred to as robot-assisted radical prostatectomy (RARP). Th e article introduces the basics of this innovative standard of operative access and tackles medical and historical aspects, oncological, medical and economic management pros and contras of robotic aid over open radical prostatectomy. Surgical trauma in RARP is clearly less pronounced compared to open surgery due to a much earlier postoperative mobilisation and a faster rehabilitation of patients leading to a statistically significant reduction in the length of hospital stay after RARP. Along with advances in intracorporeal imaging with 16-fold optical magnification coupled with shorter urethral catheterisation, RARP facilitates an earlier start of pelvic floor exercises, which reduces postoperative incontinence and need for pain relievers. Th e already mentioned technical advantages of the robotic method hold value to both patient and surgeon by securing instant access for an experienced colleague without interrupting the surgery. Noteworthy, the increasing advancement of robotic systems across the globe is leading urologist surgeons to abandon open operations. A drawback of the robotic method is much higher economic costs. However, greater expenditures may pay off in the long run by shorter hospital stays, faster rehabilitation and fewer complications demanding extra management and care.