Plain Radiographs Research Articles

Acoustic emission and 4D X-ray micro-tomography for monitoring crack propagation in rocks

Acoustic emission (AE) and 4D X-ray computed tomography (4D XCT) were used simultaneously to study crack initiation and propagation in two different types of quartz-rich sandstones during the four-point bending experiments. Statistical analysis of the AE response indicated the failure mechanisms and their dynamics. The characteristic changes observed in the AE response defined the timing of the bending interruptions for XCT scanning to reveal the development of the crack. It was possible to quantitatively describe the developing cracks in their dimensions and volume and relate this information to the rate of decrease in the post-peak region of the material response. It could be concluded that the combination and concurrent use of AE and XCT techniques represents a highly effective and reliable instrument for observation, description, analysis of the crack propagation process, and rock disintegration in detail at a microscale level. With regard to the specific sandstones studied, Mšené sandstone is softer, respectively, less brittle, while Kocbeře sandstone is characterised by a more brittle behaviour accompanied by an AE signal with higher amplitudes compared to those of Mšené.

Mitigation of DMM-induced stripe patterns in synchrotron X-ray radiography through dynamic tilting.

In synchrotron X-ray radiography, achieving high image resolution and an optimal signal-to-noise ratio (SNR) is crucial for the subsequent accurate image analysis. Traditional methods often struggle to balance these two parameters, especially in situ applications where rapid data acquisition is essential to capture specific dynamic processes. For quantitative image data analysis, using monochromatic X-rays is essential. A double multilayer monochromator (DMM) is successfully used for this aim at the BAMline, BESSY II (Helmholtz Zentrum Berlin, Germany). However, such DMMs are prone to producing an unstable horizontal stripe pattern. Such an unstable pattern renders proper signal normalization difficult and thereby causes a reduction of the SNR. We introduce a novel approach to enhance SNR while preserving resolution: dynamic tilting of the DMM. By adjusting the orientation of the DMM during the acquisition of radiographic projections, we optimize the X-ray imaging quality, thereby enhancing the SNR. The corresponding shift of the projection during this movement is corrected in post-processing. The latter correction allows a good resolution to be preserved. This dynamic tilting technique enables the homogenization of the beam profile and thereby effectively reduces noise while maintaining high resolution. We demonstrate that data captured using this proposed technique can be seamlessly integrated into the existing radiographic data workflow, as it does not need hardware modifications to classical X-ray imaging beamline setups. This facilitates further image analysis and processing using established methods.

Establishment of a Digital Laminography facility at the Malaysian Nuclear Agency

Digital Laminography (DL) is a technique that enables the estimation of indication depth from a set of digital projection radiographs. It allows the engineers or researchers to visualize and measure the depth from the object’s surface. The technique applies to welded components and non-metal applications such as composite materials. The technique also allows users to understand engineering problems and further analyze the cause of failures. Malaysian Nuclear Agency is pursuing the building and establishment the DL system at its facility. A gantry is designed to hold a 225kVp X-ray tube that is mechanically moved slowly. A 100 µm pixel size Digital Detector Array (DDA) is used to capture the images. This paper highlights simulation and a preliminary assessment to understand the physics and appropriate steps to build a DL system. It discusses the simulation and experimental study of exposure parameters and setup by digital radiographic testing (RT-D) of known imperfections of a welded steel plate before performing the DL measurement. The radiographic images and their achieved contrast sensitivity and image quality are analyzed according to ISO 17636-2. The results of simulations and experiments demonstrate a good and consistent ability to measure the depth and extension of the reconstructed imperfections within ± 1 mm regarding the actual size and position.

Conventional radiography and correlated factors of enthesopathies of the Achilles tendon and plantar fascia in patients with axial spondyloarthritis.

This study aimed to investigate the correlated risk factors and presence of radiological enthesopathies of the Achilles tendon and plantar fascia in patients with axial spondyloarthropathy (axSpA). 242 patients (121 female and 121 male) with axSpA were included in this study. The Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), the Bath Ankylosing Spondylitis Functional Index (BASFI), the Ankylosing Spondylitis Disease Activity Score with C-reactive protein (ASDAS-CRP), the Bath Ankylosing Spondylitis Radiology Index (BASRI), the Maastricht Ankylosing Spondylitis Enthesitis Score (MASES), and CRP were evaluated in all patients. The lateral foot X-rays of the patients were assessed for enthesopathies of the Achilles tendon and plantar fascia attachments. Calcaneal spur and Achilles enthesopathies were present in 57.4% of the patients. 39.3% of patients had enthesopathies in both regions. The male and female groups differed statistically in terms of weight, height, body mass index (BMI), positive family history, and duration since diagnosis (p<0.05). The presence of calcaneal spur and Achilles enthesopathies was found to be significantly correlated with age, weight, BMI, symptom duration, and the score of BASDAI, BASFI, ASDAS-CRP, BASRI, and MASES (p<0.05). The presence of enthesopathies appears to be associated with age, weight, BMI, symptom duration, and disease activity. Conventional radiography can be used as an auxiliary tool in the evaluation of entheseal abnormalities in patients with SpA, especially in patients with advanced age, long symptom duration, and high BMI.

Beyond the imaging evaluation of fractures of the lateral process of the talus: Let's not forget concomitant injuries.

Fractures of the lateral process of the talus (FLPT) are uncommon fractures that represent a clinical challenge. Traditional radiological classification systems rely predominantly on radiographic findings. However, due to the high rate of FLPT misdiagnosis and the limited accuracy in evaluating concomitant talar injuries through plain radiographs, novel imaging classification systems have been developed that aim to enhance the diagnosis of concomitant talar injuries, thereby optimizing patient management and reducing the incidence of long-term complications.

Image Quality Comparison of Three 3D Mobile X-Ray Imaging Guidance Devices Used in Spine Surgery: A Phantom Study

An image-quality CT phantom was scanned with three different 3D X-ray imaging guidance devices in the operating theatre: O-Arm, Loop-X, and Airo TruCT. Default acquisition and reconstruction parameters for lumbar spine procedures were used on each device. The tube current was set to a dose level of around 27 mGy. A task-based image quality assessment was performed by calculating the noise power spectrum (NPS) and task transfer function (TTF). A detectability index (d’) was calculated for three simulated bone lesions. The noise magnitude of the O-Arm was higher than the Airo TruCT, and the Loop-X had higher noise than the Airo TruCT. The highest average NPS frequency was for the O-Arm images, and the lowest was for the Loop-X. The TTFs at 50% values were similar for the Airo TruCT and Loop-X devices. Compared to Airo TruCT, the TTF at 50% value increased with the O-Arm by 53.12% and 41.20% for the Teflon and Delrin inserts, respectively. Compared to Airo TruCT, the d’ value was lower with Loop-X by −26.73%, −27.02%, and −23.95% for lytic lesions, sclerotic lesions, and high-density bone, respectively. Each 3D-imaging spine surgery guidance device has its own strengths and weaknesses in terms of image quality. Cone-beam CT systems apparently offer the best compromise between noise and spatial resolution for spine surgery.

Dynamic Instability Is Underestimated on Standing Flexion-Extension Films When Compared With Prone CT Imaging.

Single center retrospective cohort study. We performed a retrospective study evaluating the incidence and degree of L4-5 anterior spondylolisthesis in patients with standard supine MRI, standing flexion-extension radiographs, and prone CT. We hypothesize that prone CT imaging will provide greater sensitivity for instability compared with conventional flexion extension or supine positions. Dynamic lumbar instability evaluated by flexion-extension radiographs may underestimate the degree of lumbar spondylolisthesis. Despite efforts to characterize dynamic instability, significant variability remains in current guidelines regarding the most appropriate imaging modalities to adequately evaluate instability. We assessed single-level (L4-5) anterolisthesis between 2014 and 2022 with standing lateral conventional radiographs (CR), flexion-extension images, prone CT images (CT), or supine MRI images (MRI). We identified 102 patients with L4-5 anterolisthesis. The average translation (±SD) measured were 4.9±2.2mm (CR), 2.5±2.6mm (CT), and 3.7±2.6mm (MRI) (P<0.001). The mean difference in anterolisthesis among imaging modalities was 2.7±1.8mm between CR and CT (P<0.001), 1.8±1.4mm between CR and MRI (P<0.001), and 1.6±1.4mm between CT and MRI (P=0.252). Ninety-two of 102 patients (90.2%) showed greater anterolisthesis on CR compared with CT, 72 of 102 (70.6%) comparing CR to MRI, and 27 of 102 (26.5%) comparing CT to MRI. We found that 17.6% of patients exhibited ≥3mm anterior translation comparing CR with MRI, whereas 38.2% of patients were identified comparing CR with CT imaging (χ2 test P=0.0009, post hoc Fisher exact test P=0.0006 between CR and CT). Only 5.9% of patients had comparable degrees of instability between flexion-standing. Prone CT imaging revealed the greatest degree of single L4-5 segmental instability compared with flexion-extension radiographs.

Castellvi classification of lumbosacral transitional vertebrae: comparison between conventional radiography, CT, and MRI.

The reliability and diagnostic accuracy of commonly used diagnostic imaging modalities in the classification of lumbosacral transitional vertebrae (LSTV) are poorly known, and comparative studies are scarce. To compare the diagnostic performance of conventional radiography (CR), computed tomography (CT), and magnetic resonance imaging (MRI) in classifying LSTVs. In this retrospective cross-sectional study, a total of 852 patients undergoing lumbar imaging studies using all three modalities were initially assessed for the presence of LSTV using CT scans. In total, 100 patients with LSTV anatomy were identified. Four readers performed blinded and independent evaluations of these 100 patients on each modality, and an experienced fellowship-trained radiologist performed a gold standard read using all three modalities. Inter-reader reliability metrics were analyzed in comparison to the gold standard. Statistical software R (4.2.1) was used for the analyses. We found superior diagnostic efficacy for CT: the sensitivity, specificity, accuracy, and balanced accuracy were 76%, 93%, 77%, and 84%, respectively. For MRI, the metrics were 54%, 88%, 56%, and 68%, and for CR 32%, 85%, 42%, and 59%, respectively. Inter-reader reliability was found to be good for CT (κ = 0.63-0.71) and fair for both CR (κ = 0.16-0.32) and MRI (κ = 0.24-0.56). CT had the highest diagnostic performance in all measured metrics with good inter-reader reliability. MRI and CR showed fairly poor sensitivity and accuracy, and thus consideration should be used when classifying LSTVs with these two modalities.

Corrective Intra-articular Osteotomy for Malreductions of Tibial Pilon Fractures in Patients Less Than 55 Years Old.

Tibial pilon malreductions are challenging to correctively reconstruct, and the relevant literature is limited. This study aims to assess whether corrective intra-articular osteotomy is worthwhile to treat relatively younger (<55-year-old) patients with intra-articular malreductions of pilon fractures. This is a retrospective observational study with a minimum follow-up of 2 years. From 2013 to 2021, 21 patients (mean age: 39.2 ± 11.2 years) with intra-articular pilon malreductions ≥6 weeks treated with intra-articular osteotomies were analyzed. The median interval time until intra-articular osteotomy was 76 (interquartile range [IQR], 49-149) days. Plain radiographs and computed tomography were used for radiographic assessments. Clinical outcomes were evaluated with visual analog scale (VAS), the American Orthopaedic Foot & Ankle Society (AOFAS) ankle-hindfoot score, the 36-Item Short-Form Health Survey (SF-36) score, and ankle range of motion (ROM). The median follow-up duration was 34.6 (IQR, 26.1-74.3) months. The median articular displacement was reduced from 12.7 mm preoperatively to 2.7 mm postoperatively (P < .05). According to the Kellgren-Lawrence grading, 16 patients were assigned to stage II, 4 to stage III, and 1 to stage IV. In the 10 patients with available preoperative assessments, substantial improvement was found in the VAS score, from 5.90 to 2.0 at the final follow-up (P < .05). Similarly, the AOFAS ankle-hindfoot score and SF-36 scores improved (P < .05). Ankle ROM did not change a clinically meaningful amount. Progressive degenerative changes were noted in 2 of 10 patients who had adequate preoperative imaging. Four patients had VAS scores ≥4 including 1 patient who is scheduled for an arthrodesis. In this small series, we found that the corrective osteotomies generally provided reasonable improvement at 3 years in patients <55 years old with intra-articular malreduction of pilon fractures. Prospective cohort studies are needed to determine if it is worthwhile in long-term outcome.

A flexible porous polyimide/copper composite film toward high-mass-loading anodes in lithium-ion batteries

Conventional metal foil current collectors are essential for electronic conduction in lithium-ion batteries, but the planar structure limits the fast transporting of electron and the power density. Herein, a light, conductive, self-extinguishing, and flexible porous polyimide/copper composite film (PIF/Cu) derived from a polyimide foam was fabricated via hot pressing and electroless plating methods. The honeycomb structure was illustrated in PIF/Cu under a 3D X-ray tomography microscope, revealing the successful construction of a 3D conductive network. PIF/Cu-30 possessed an electronic conductivity of as high as 3.6 × 105 S m−1 at a bulk density of 0.26 g cm−3 and exhibited exceptional structural stability even after successive and harsh mechanical loads. Graphite with a mass load of 12 mg cm−2 was loaded into the PIF/Cu-30 to prepare the anode for cell assembly. The cells using PIF/Cu-30 achieved a better performance in capacity retention (98.2 %@60 cycles) than those using traditional Cu foils (55.1 %@60 cycles), which resulted from the fast transport of electrons and Li-ion through the 3D conductive networks in the porous PIF/Cu-30.

Size-specific dose estimates calculated using patient size measurements from scanned projection radiograph in high-resolution chest computed tomography.

Size-specific dose estimates (SSDE) are used to assess patient-specific radiation exposure in Computed Tomography (CT), complementing the volume CT dose index (CTDIvol). This study compared SSDE calculated using patient's lateral size from scan projection radiograph (SPR) with SSDE calculated using water equivalent diameter (Dw) from tomographic images in adult chest high-resolution CT (HRCT). In a single-centre study, the CTDIvol and dose-length product (DLP) were recorded from HRCT dose reports of adult patients. Lateral width (SLat), at the centre of the scan range, from the SPR was measured and the SSDE (SSDER) was calculated using conversion factors related to SLat. Average CT number, area of the slice, and lateral size of the patient (AxLat) were measured on the middle slice. The Dw and SSDE from Dw (SSDEW) were calculated. SSDER and SSDEW were compared using Wilcoxon signed rank test. Correlation between patient size and dosimetry parameters were investigated using Spearman Correlation test with statistical significance at P < 0.05. Bland-Altman plot was also used to test agreement between the two SSDE values. Median CTDIvol, DLP, SSDER and SSDEW were 11.0 mGy, 372 mGy.cm, 11.6 mGy and 12.9 mGy, respectively. Small but statistically significant differences (P < 0.03) were found between SLat and AxLat as well as between SSDER and SSDEW. Bland-Altman analysis resulted in borderline agreement between SSDE values. Moderate correlations were observed between dosimetry quantities and patient size measurements (ρ > 0.640; P < 0.001). SSDEw showed statistically significant correlation (ρ = 0.587 and P < 0.001) with SSDER. SSDER may be used to assess patients' absorbed radiation dose, before the scan, in adult chest HRCT. The median value of SSDER was about 10% lower than the median value SSDEW. However, the SSDEW should be used after the scan to establish effective dose and radiation risk to the patient.

Computer diffraction tomography: a comparative analysis of the use of controlled and wavelet filters for image processing

The paper provides digital processing of 2D X-ray projection images of a Coulomb-type point defect in a Si(111) crystal recorded by a detector against the background of statistical Gaussian noise. A managed filter and a wavelet filter with a 4th-order Daubechies function are used. The efficiency of filtering 2D images is determined by calculating the relative quadratic deviations of the intensities of filtered and reference (noiseless) 2D images averaged over all points. A comparison of the calculated values of the relative deviations of the intensities shows that the considered methods work quite well and both, in principle, can be effectively used in practice for noise processing of X-ray diffraction images used for 3D reconstruction of nanoscale defects of crystal structures.

Ferroelectric Smectic C Liquid Crystal Phase with Spontaneous Polarization in the Direction of the Director.

In the previous study, the existence of an unidentified ferroelectric smectic phase is demonstrated in the low-temperature region of the ferroelectric smectic A phase, where the layer spacing decreases with decreasing temperature. In the present study, the phase is identified by taking 2D X-ray diffraction images of a magnetically oriented sample while allowing it to rotate and constructed a 3D reciprocal space with the sample rotation angle as the third axis for the whole picture of the reciprocal lattice vectors originating from the smectic structure. Consequently, circular diffraction images are obtained when the reciprocal lattice vectors are evenly distributed on the conical surface at a certain inclination angle in the reciprocal space. This result provides clear evidence that the phase in question is smectic C. The polarization properties also showed that the observed smectic C phase has spontaneous polarization in the direction parallel to the director and is identified as ferroelectric smectic C. These results provide a new type of classification for liquid crystalline phases that has been established over many years and is a significant contribution to the basic science of soft matter research.

Acromion Fracture in Children (About a Case)

The shoulder trauma in children frequently results in injuries to the clavicle, while acromion fractures remain a rare occurrence. We report a case of an acromion fracture in an 11-year-old child following a road traffic accident (motorcycle passenger struck by a car). The anteroposterior shoulder X-ray revealed an oblique fracture of the distal end of the posterolateral portion of the acromion. Treatment involved immobilization with an arm-to-body sling, and the follow-up was uncomplicated. We emphasize the importance of detecting this rare fracture in the context of any shoulder trauma.

Successful management of megaoesophagus associated with hypothyroidism in a dog: A case report

A seven-year-old male Dachshund was presented with a history of chronic regurgitation and weight loss for two months. On clinical examination, dry and rough hair coat with alopecia on nose bridge and rat tail appearance were observed. Elevated rectal temperature and increased respiratory rate were noticed. Auscultation of lung field revealed mild crackles. Leucocytosis and mild anaemia were evident on complete blood count. Hypercholesterolaemia, hypertriglyceridaemia and elevation of Lactate dehydrogenase (LDH) and Alkaline phosphatase (ALP) were observed in serum biochemistry. The total T4 (TT4) value was low and canine-specific thyroid stimulating hormone (cTSH) was elevated. Megaoesophagus was confirmed by plain radiography. Barium contrast radiograph revealed generalised dilatation with pooling of barium in the oesophagus. The animal was treated with levothyroxine sodium at 0.02 mg/kg BW PO BID and bethanechol at 10 mg PO TID. Supportive therapy included antibiotics, antacids and antiemetics. Elevated feeding was advised. The animal had no episodes of regurgitation even after one month Keywords: Megaoesophagus, hypothyroidism, bethanechol, elevated feeding

Do we need an image quality evaluation system in conventional radiography?

Cilj: Ovim radom nastoji se ukazati na važnost uspostave sustava za ocjenu kvalitete radiološke slike u konvencionalnoj radiografiji. Metode: Studija je provedena retrospektivno, usporedbom kvalitete radiološke slike i načina dobivanja radiološke slike. Ocijenjeno je 20 radioloških slika zdjelice, a ocjena je provedena prema europskim kriterijima za kvalitetu radiološke slike zdjelice. Kvalitetu slike su ocjenjivali radiolog, radiološki tehnolog i student radiološke tehnologije. Usporedbom s istim kriterijem analiziran je i način rada pri oslikavanju zdjelice u 3654 pacijenta te srca i pluća u 57758 pacijenata. Analizirana je i praksa sužavanja rendgenskog snopa na područje od interesa za 50 radioloških slika srca i pluća. Rezultati: Samo jedna slika zdjelice ocijenjena je najvećom mogućom ocjenom od strane sva tri ocjenitelja. Subjektivne procjene ocjenitelja vezano uz odabir parametara ekspozicije razlikovale su se u većini ocjenjivanih slika zdjelice. Naponi na rendgenskoj cijevi korišteni pri oslikavanju zdjelice većinom su bili u preporučenom rasponu, dok su za srce i pluća u većini slučajeva bili manji od preporučene vrijednosti. Zdjelice su većinom oslikavane korištenjem udaljenosti žarišta rendgenske cijevi od prijemnika slike koje su bile u prihvatljivom rasponu osim u slučaju onih pacijenata koji su za vrijeme oslikavanja stajali. U slučaju oslikavanja srca i pluća ove su udaljenosti uglavnom bile u prihvatljivom rasponu osim u slučaju ležećih pacijenata kada je veći broj pacijenata oslikan korištenjem manjih udaljenosti. Svih 50 analiziranih radioloških slika srca i pluća bilo je uređeno na način da su po provedenom oslikavanju uklonjeni rubni dijelovi slike. Zaključci: Rezultati provedene analize ukazuju na potrebu uspostave i provedbe sustava za ocjenu kvalitete radiološke slike koji bi uključivao i analizu načina rada.

Modular Synthesis of Monoanionic PN Ligands Leads to Unexpected Structural Diversity in Lanthanum Chemistry.

We report a new synthetic entry to a series of N-substituted anilidophosphine ligands (short HPNR, R = pTol (HPNTol), 3,5-dimethylphenyl (HPN3,5Me), 3,5-bis(trifluoromethyl)phenyl (HPN3,5CF3), 2-methoxyphenyl (HPNOMe), diisopropylphenyl (HPNDipp), and adamantyl (HPNAd)), allowing a detailed tuning of their steric (and electronic) properties. HPNR could be converted into their lithium salts LiPNR, which are effective precursors for salt metathesis reactions. The new ligands are used for the synthesis of an array of lanthanide complexes using LaCl3(THF)1.2 as a precursor. Depending on the steric bulk of the anilidophosphine ligand, either chloride-bridged dimers of the general formula [(PNR)2La(μ-Cl2)La(PNR)2] (R = pTol (3f), 3,5-dimethylphenyl (3d) and adamantyl (3a)) or mononuclear complexes of the general formula (PNR)2LaCl (R = diisopropylphenyl (3e)) are observed, if the complexation reaction is carried out in toluene. Contrary, if salt metathesis reactions are carried out in dimethoxyethane (DME) as a coordinating solvent, -ate complexes of the general formula [(PNR)2La(μ-Cl2)Li(DME)] (R = Adamantyl (4a) and R = 2-methoxyphenyl (4d)) or [Li(DME)3][(PNR)2LaCl2] (R = 3,5-bis(trifluoromethyl)phenyl (4b), R = pTol (4f) and R = 3,5-dimethylphenyl (4d)) are observed. All ligands and complexes have been thoroughly characterized by 1D and 2D NMR spectroscopy, IR, and X-ray crystallography. Finally, the steric demand of the new anilidophosphine ligands is evaluated using SambVca simulations.

Comparison of elastic properties of periodic and aperiodic porous structures produced by additive methods

The aim of this work was to design, print, and examine elastic properties of porous structures with various parameters and beam distributions. These structures, generated using an algorithm, featured three types of lattices: octet, cubic, and Voronoi diagram-based, with different porosities (40 %, 60 %, 80 %) and beam sizes (0.45 mm, 0.66 mm). They were printed using Direct Light Processing and examined using X-ray computed microtomography. Compression tests were conducted to determine the Young’s modulus. The results were compared with computer simulations performed using Abaqus. The tools used, such as 3D printing and X-ray computed microtomography, were described, and the results and conclusions of the tests were presented. As a result, comparable outcomes were obtained for structures with higher beam diameter, while significantly different results were observed for structures with lower beam diameter.

Three-dimensional MRI analysis of elbow anatomy and kinematics in children with ulnar dimelia.

Ulnar dimelia often presents with restricted elbow movement. To develop a treatment strategy to improve elbow mobility, a detailed understanding of the skeletal deformity is needed. We created 3-D models of the cartilage and bone in the elbows of four children with ulnar dimelia by segmentation of MRI scans. We analysed the anatomy and performed a kinematic analysis. In all four children, the distal humerus was triangular in shape and consisted of a medial epicondyle, an enlarged lateral epicondyle and an anterior epicondyle. By comparing the 3-D images with conventional radiographs, we found that the projection of the enlarged lateral epicondyle created two longitudinal lines, which is a radiographic hallmark feature of the triangular-shaped distal humerus. In addition, during elbow flexion, the radial forearm bone slides along the lateral trochlea rather than rotates. This knowledge can aid surgeons to plan treatment for improving elbow mobility in ulnar dimelia.Level of evidence: IV.

Computed tomography of acute orbital trauma in children: a retrospective study

INTRODUCTION: Orbital injuries account for 36 to 64% of all blunt trauma to the facial bones. Diagnosis of orbital wall fractures is carried out using conventional radiography in several projections and computed tomography; magnetic resonance imaging is less commonly used. Often, due to the small displacement of orbital bone fragments, X-ray diagnosis is difficult. Multislice CT with reconstruction of sagittal, coronal projections and 3D in the bone window in such cases is the best visualization method. However, there are still no clear indications for the use of each method and there is no complete view of the CT characteristics of orbital damage.OBJECTIVE: To study the diagnostic value of computed tomography of orbital fractures in pediatric patients with acute trauma.MATERIAL AND METHODS: Retro- and prospectively analyzed the results of CT scans of 94 patients with facial fractures from 01/01/2023 to 09/01/2023 to assess combined orbital injuries. Orbital fractures were detected in 63 children (67.0%). There were 44 boys (69.84%), 19 girls (30.15%) aged from 7 months to 17 years 10 months (average age 10.3). Statistics: For statistical analysis, the method of calculating the nominal correlation using the Kramer coefficient (V) using the IBM SPSS Statistics software package was used.RESULTS: Concomitant injury was observed in 30 (47.6%); isolated 33 (52.36%). The number and frequency of fractures observed were as follows: superior wall of the orbit — 39 (61.9%); zygomatic complex — 19 (30.1%); lower wall of the orbit — 43 (68.2%); nasal bone — 17 (26.9%); lower jaw — 6 (9.5%); medial wall of the orbit — 28 (44.4%); upper jaw — 27 (42.8%); alveolar process — 6 (9.5%); isolated zygomatic arch — 14 (22.2%); Le Fort type I — 1 (1.5%); Le Fort type II — 2 (3.1%); and Le Fort type III — 0 (0%). Orbital hematomas were found in 25 patients (39.6%). It was revealed a strong correlation between the presence of contiguous skull fractures and multiple skull fractures (V=0.878, p&lt;0.001), frontal sinus fractures and frontal sinus hemosinus (V=0.69, p&lt;0.001).CONCLUSION: Orbital fractures are a frequent type of facial fracture occurring in children with blunt isolated and combined trauma. In children with blunt trauma, head CT combined with clinical examination is currently the optimal tool for diagnosing clinically significant orbital injuries. There is a strong correlation between orbital hematomas and orbital vault fractures, orbital hematomas and lattice fractures, adjacent skull and orbital vault fractures, and adjacent skull and lattice fractures. CT examination should include multiplanar (in coronal and sagittal planes) and 3D reconstructions, which help to assess the extent of the fracture, the presence of diastasis, the degree of muscle impingement. Based on the data obtained, the clinician determines the need for surgical intervention.