1.Magnetic resonance imaging appearance of foreign-body granulomatous reactions to dermal cosmetic fillers.
Andre Luiz Ferreira COSTA ; Rubens CALIENTO ; Glauber Bareia Liberato DA ROCHA ; Joao Pedro Perez GOMES ; Alison Jhisel Calle MANSMITH ; Claudio Froes DE FREITAS ; Paulo Henrique BRAZ-SILVA
Imaging Science in Dentistry 2017;47(4):281-284
Foreign body granulomas can develop after the injection of various cosmetic filling materials into the facial area to flatten wrinkles. Clinically, reactive lesions are easily mistaken for soft-tissue neoplasms or cysts. This report presents a case of foreign body granuloma in a 52-year-old female patient complaining of a painless swelling in the nasolabial region. Both clinical and histological features are described, underscoring the diagnostic role of magnetic resonance imaging findings.
Female
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Granuloma, Foreign-Body
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Humans
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Magnetic Resonance Imaging*
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Middle Aged
2.Cone-beam computed tomography texture analysis can help differentiate odontogenic and non-odontogenic maxillary sinusitis
Andre Luiz Ferreira COSTA ; Karolina Aparecida Castilho FARDIM ; Isabela Teixeira RIBEIRO ; Maria Aparecida Neves JARDINI ; Paulo Henrique BRAZ-SILVA ; Kaan ORHAN ; Sérgio Lúcio Pereira de Castro LOPES
Imaging Science in Dentistry 2023;53(1):43-51
Purpose:
This study aimed to assess texture analysis (TA) of cone-beam computed tomography (CBCT) images as a quantitative tool for the differential diagnosis of odontogenic and non-odontogenic maxillary sinusitis (OS and NOS, respectively).
Materials and Methods:
CBCT images of 40 patients diagnosed with OS (N=20) and NOS (N=20) were evaluated. The gray level co-occurrence (GLCM) matrix parameters, and gray level run length matrix texture (GLRLM) parameters were extracted using manually placed regions of interest on lesion images. Seven texture parameters were calculated using GLCM and 4 parameters using GLRLM. The Mann-Whitney test was used for comparisons between the groups, and the Levene test was performed to confirm the homogeneity of variance (α=5%).
Results:
The results showed statistically significant differences (P<0.05) between the OS and NOS patients regarding 3 TA parameters. NOS patients presented higher values for contrast, while OS patients presented higher values for correlation and inverse difference moment. Greater textural homogeneity was observed in the OS patients than in the NOS patients, with statistically significant differences in standard deviations between the groups for correlation, sum of squares, sum of entropy, and entropy.
Conclusion
TA enabled quantitative differentiation between OS and NOS on CBCT images by using the parameters of contrast, correlation, and inverse difference moment.
3.Lateral pterygoid muscle volume and migraine in patients with temporomandibular disorders.
Sergio Lucio Pereira de Castro LOPES ; Andre Luiz Ferreira COSTA ; Thiago de Oliveira GAMBA ; Isadora Luana FLORES ; Adriana Dibo CRUZ ; Li Li MIN
Imaging Science in Dentistry 2015;45(1):1-5
PURPOSE: Lateral pterygoid muscle (LPM) plays an important role in jaw movement and has been implicated in Temporomandibular disorders (TMDs). Migraine has been described as a common symptom in patients with TMDs and may be related to muscle hyperactivity. This study aimed to compare LPM volume in individuals with and without migraine, using segmentation of the LPM in magnetic resonance (MR) imaging of the TMJ. MATERIALS AND METHODS: Twenty patients with migraine and 20 volunteers without migraine underwent a clinical examination of the TMJ, according to the Research Diagnostic Criteria for TMDs. MR imaging was performed and the LPM was segmented using the ITK-SNAP 1.4.1 software, which calculates the volume of each segmented structure in voxels per cubic millimeter. The chi-squared test and the Fisher's exact test were used to relate the TMD variables obtained from the MR images and clinical examinations to the presence of migraine. Logistic binary regression was used to determine the importance of each factor for predicting the presence of a migraine headache. RESULTS: Patients with TMDs and migraine tended to have hypertrophy of the LPM (58.7%). In addition, abnormal mandibular movements (61.2%) and disc displacement (70.0%) were found to be the most common signs in patients with TMDs and migraine. CONCLUSION: In patients with TMDs and simultaneous migraine, the LPM tends to be hypertrophic. LPM segmentation on MR imaging may be an alternative method to study this muscle in such patients because the hypertrophic LPM is not always palpable.
Humans
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Hypertrophy
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Jaw
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Magnetic Resonance Imaging
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Migraine Disorders*
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Pterygoid Muscles*
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Temporomandibular Joint
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Temporomandibular Joint Disorders*
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Volunteers