scholarly journals Validation and feasibility of liver T1 mapping using free breathing MOLLI sequence in children and young adults

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yeon Jin Cho ◽  
Woo Sun Kim ◽  
Young Hun Choi ◽  
Seul Bi Lee ◽  
SeungHyun Lee ◽  
...  
Keyword(s):  
Young Adults ◽  
Relaxation Times ◽  
Free Breathing ◽  
Phantom Study ◽  
Inversion Recovery ◽  
Breath Hold ◽  
T1 Relaxation ◽  
Molli Sequence ◽  
Children And Young Adults ◽  
The Mean

Abstract We investigated the feasibility of free-breathing modified Look-Locker inversion recovery (MOLLI) sequence for measuring hepatic T1 values in children and young adults. To investigate the accuracy and the reproducibility of the T1 maps, a phantom study was performed with 12 different gadoterate meglumine concentrations and the T1 relaxation times of phantoms measured with the MOLLI sequence were compared against those measured with three different sequences: spin-echo inversion recovery, variable flip angle (VFA), and VFA with B1 correction. To evaluate the feasibility of free-breathing MOLLI sequence, hepatic T1 relaxation times obtained by free-breathing and breath-hold technique in twenty patients were compared. The phantom study revealed the excellent accuracy and reproducibility of MOLLI. In twenty patients, the mean value of hepatic T1 values obtained by free-breathing (606.7 ± 64.5 ms) and breath-hold (609.8 ± 64.0 ms) techniques showed no significant difference (p > 0.05). The Bland–Altman plot between the free-breathing and breath-hold revealed that the mean difference of T1 values was − 3.0 ms (− 0.5%). Therefore, T1 relaxation times obtained by MOLLI were comparable to the values obtained using the standard inversion recovery method. The hepatic T1 relaxation times measured by MOLLI technique with free-breathing were comparable to those obtained with breath-hold in children and young adults.

scholarly journals Reproducibility of T1 relaxation times in diagnostic MRI: A phantom study

2021 ◽  
pp. 100038
Author(s):  
Derick Yongabi ◽  
Nathalie Mertens ◽  
Ronald Peeters
Keyword(s):  
Relaxation Times ◽  
Phantom Study ◽  
T1 Relaxation

OBSERVATIONS OF TOTAL SERUM BASE IN CHILDREN AND YOUNG ADULTS BY A CONDUCTIVITY METHOD

PEDIATRICS ◽  
1949 ◽  
Vol 4 (6) ◽  
pp. 805-809
Author(s):  
W. M. KELSEY ◽  
L. B. LEINBACH
Keyword(s):  
Young Adults ◽  
Total Serum ◽  
Age Group ◽  
Conductivity Method ◽  
Normal Children ◽  
Significant Difference ◽  
Children And Young Adults ◽  
The Mean ◽  
Standard Deviations

Values for total serum base in 96 normal children under 12 years of age as determined by the conductivity method fell between 143 to 160.5 mEq./l. The mean was 153. Standard deviations for each age group are given. The values in 73 normal persons above the age of 12 varied from 142 to 160.5 mEq./l. The mean was 147 mEq./l. A statistically significant difference between the total serum base in children and adults was found.

scholarly journals Deep brain stimulation in children and young adults with secondary dystonia: the Children's Hospital Los Angeles experience

2013 ◽  
Vol 35 (5) ◽  
pp. E7 ◽  
Author(s):  
Joffre E. Olaya ◽  
Eisha Christian ◽  
Diana Ferman ◽  
Quyen Luc ◽  
Mark D. Krieger ◽  
...  
Keyword(s):  
Young Adults ◽  
Deep Brain Stimulation ◽  
Brain Stimulation ◽  
Secondary Dystonia ◽  
Benefit Evaluation ◽  
Generalized Dystonia ◽  
Children And Young Adults ◽  
The Mean ◽  
Deep Brain

Background Dystonia is a movement disorder in which involuntary sustained or intermittent muscle contractions cause twisting and repetitive movements, abnormal postures, or both. It can be classified as primary or secondary. There is no cure for dystonia and the goal of treatment is to provide a better quality of life for the patient. Surgical intervention is considered for patients in whom an adequate trial of medical treatment has failed. Deep brain stimulation (DBS), specifically of the globus pallidus interna (GPi), has been shown to be extremely effective in primary generalized dystonia. There is much less evidence for the use of DBS in patients with secondary dystonia. However, given the large number of patients with secondary dystonia, the significant burden on the patients and their families, and the potential for DBS to improve their functional status and comfort level, it is important to continue to investigate the use of DBS in the realm of secondary dystonia. Object The objective of this study is to review a series of cases involving patients with secondary dystonia who have been treated with pallidal DBS. Methods A retrospective review of 9 patients with secondary dystonia who received treatment with DBS between February 2011 and February 2013 was performed. Preoperative and postoperative videos were scored using the Barry-Albright Dystonia Scale (BADS) and Burke-Fahn-Marsden Dystonia Rating Scale (BFMDRS) by a neurologist specializing in movement disorders. In addition, the patients' families completed a subjective questionnaire to assess the perceived benefit of DBS. Results The average age at DBS unit implantation was 15.1 years (range 6–20 years). The average time to follow-up for the BADS evaluation from battery implantation was 3.8 months (median 3 months). The average time to follow-up for the subjective benefit evaluation was 10.6 months (median 9.5 months). The mean BADS scores improved by 9% from 26.5 to 24 (p = 0.04), and the mean BFMDRS scores improved by 9.3% (p = 0.055). Of note, even in patients with minimal functional improvement, there seemed to be decreased contractures and spasms leading to improved comfort. There were no complications such as infections or hematoma in this case series. In the subjective benefit evaluation, 3 patients' families reported “good” benefit, 4 reported “minimal” benefit, and 1 reported no benefit. Conclusions These early results of GPi stimulation in a series of 9 patients suggest that DBS is useful in the treatment of secondary generalized dystonia in children and young adults. Objective improvements in BADS and BFMDRS scores are demonstrated in some patients with generalized secondary dystonia but not in others. Larger follow-up studies of DBS for secondary dystonia, focusing on patient age, history, etiology, and patterns of dystonia, are needed to learn which patients will respond best to DBS.

scholarly journals Efficacy of Olanzapine for High and Moderate Emetogenic Chemotherapy in Children

Children ◽  
2020 ◽  
Vol 7 (9) ◽  
pp. 140
Author(s):  
So Rae Lee ◽  
Su Min Kim ◽  
Min Young Oh ◽  
Jae Min Lee
Keyword(s):  
Young Adults ◽  
Pediatric Patients ◽  
Complete Response ◽  
Emetogenic Chemotherapy ◽  
Controlled Study ◽  
Safety And Efficacy ◽  
Disturbed Sleep ◽  
Children And Young Adults ◽  
The Mean ◽  
Prospective Controlled Study

This study was conducted to investigate the safety and efficacy of olanzapine for high and moderate emetogenic chemotherapy in children and young adults. We retrospectively reviewed the records of pediatric patients (n = 13) with cancer who had been administered olanzapine as an anti-emetic drug (AED) during a high and moderate emetogenic chemotherapy block from January 2018 to March 2020. Patients were administered other prophylactic AEDs according to practice guidelines. The mean age of the patients was 14.1 ± 5.5 years. The total number of chemotherapy cycles was 41. Twenty-one (51.2%) chemotherapy blocks were high emetogenic chemotherapy and 20 (48.8%) blocks were moderate emetogenic chemotherapy. Olanzapine was used for prophylaxis in 20 (48.8%) blocks of chemotherapy and rescue in 21 (51.2%). Of the 41 cycles, a complete response to olanzapine was achieved in 31 (75.6%), partial response in 6 (14.6%), and no response in 4 (9.8%). The mean dose was 0.07 ± 0.04 mg/kg/dose and 2.50 ± 1.37 mg/m2/dose. Adverse effects included somnolence, hyperglycemia, fatigue, and disturbed sleep. Our findings indicate that olanzapine was effective and safe for treating chemotherapy-induced nausea and vomiting in children. A prospective controlled study is needed to confirm these findings.

Deep inspiration breath hold (DIBH) with electromagnetic surface transponder confirmation of chest wall (CW) position during radiation for left breast cancer.

2014 ◽  
Vol 32 (26_suppl) ◽  
pp. 126-126
Author(s):  
Madeera Kathpal ◽  
Kelly Sun ◽  
Cynthia Malmer ◽  
Stephanie Ninneman ◽  
Stacie Wendt ◽  
...  
Keyword(s):  
Free Breathing ◽  
Left Breast ◽  
Breath Hold ◽  
Breast Cancers ◽  
Deep Inspiration Breath Hold ◽  
Heart Dose ◽  
Real Time Tracking ◽  
The Mean ◽  
The Difference ◽  
Ischemic Events

126 Background: DIBH during radiation of left breast cancers reduces heart dose, potentially reducing late cardiac ischemic events, but requires a treatment CW position significantly different from a free-breathing (FB) position. We sought to improve the accuracy of radiation therapy during DIBH by using electromagnetic surface transponders to track the position of the CW during treatment. We examined the benefit of this technique in reducing dose to the heart and consistently reproducing the DIBH position. We also evaluated the difference between FB and DIBH CW position and compared CW movement within the plateau of each DIBH to within beam-on time. Methods: 15 patients participated in this IRB-approved study. Patients were planned and treated using DIBH. We fused treatment-position FB CT scans to DIBH scans to compare mean heart (MH) and left anterior descending coronary artery (LAD) dose. We used surface transponder tracking reports to determine CW motion at the time of daily port films, during FB, the plateau of each DIBH, and beam-on time. We summed anterior and superior motion using the Pythagorean Theorem and report our results in this combined axis. Paired t-test was used to compare heart dose with vs. without DIBH and CW motion during plateau DIBH vs. beam-on. Results: DIBH significantly reduced MH and LAD dose vs. FB plans (MH 1.26 ± 0.51 Gy v 2.84 ± 1.55 Gy, p < 0.01), (LAD 5.49 ± 4.02 Gy v 18.15 ± 8.78 Gy, p < 0.01). DIBH CW position was a mean of 13.9 ± 5.3 mm anterior and superior to FB position. The mean difference in CW position at the time of daily port film vs. beam-on was -1.0 ± 2.5 mm. Plateau DIBH CW motion was 2.8 ± 2.3 mm, significantly increased from CW motion during beam-on (1.1 ± 1.2 mm, p < 0.01). Treatment was paused in 23% of fractions to adjust for suboptimal breath hold or CW position. Conclusions: DIBH reduced the MH and LAD dose by at least 50%. Real-time tracking with electromagnetic transponders allowed us to limit treatment to the most stable portion of the DIBH plateau, significantly reducing intra-fraction motion. Electromagnetic confirmation of CW position allowed verification of breath-hold reproducibility.

Reduced Hemoglobin Values in Children and Young Adults With Hemophilia

PEDIATRICS ◽  
1988 ◽  
Vol 81 (6) ◽  
pp. 840-845
Author(s):  
George R. Buchanan ◽  
Christine A. Holtkamp
Keyword(s):  
Young Adults ◽  
Iron Deficiency ◽  
Transferrin Saturation ◽  
Hemoglobin Concentration ◽  
Occult Blood ◽  
Anemia Of Chronic Disease ◽  
Erythrocyte Protoporphyrin ◽  
Age Related ◽  
Children And Young Adults ◽  
The Mean

Mild leukopenia and thrombocytopenia are common in multitransfused hemophiliacs. Because little attention has previously been directed to measurements of erythropoiesis in these patients, we prospectively examined hemoglobin concentration and RBC indices in 94 children and young adults with hemophilia during comprehensive clinic visits. Additional studies performed in many included serum transferrin saturation, ferritin, haptoglobin, and free erythrocyte protoporphyrin measurements. Hemoglobin concentrations were recorded as age-related percentile values. Hemophiliacs of all ages and degrees of severity often had lower than average values for hemoglobin; 31% had values less than the third percentile, 46% less than the tenth percentile, and 83% less than the mean value. Reduced hemoglobin percentile values were unrelated to age, severity of disease, or human immunodeficiency virus antibody status. Only five patients had an obvious cause for anemia. Serum ferritin, transferrin saturation, and erythrocyte protoporphyrin values were usually normal, indicating that iron deficiency and anemia of chronic disease were uncommon. Although serum haptoglobin was reduced in 44% of the patients, reticulocyte count was infrequently increased. We conclude that hemoglobin values are frequently less than the mean normal values for age in hemophiliacs. Although frank anemia is common, it is usually mild and without obvious cause. Hemophiliac individuals with slightly reduced hemoglobin values probably do not routinely require detailed investigation for occult blood loss, iron deficiency, or inflammation.

Spatial Variation of T2 Relaxation Times of Patellar Cartilage and Physeal Patency: An In Vivo Study in Children and Young Adults

2014 ◽  
Vol 202 (3) ◽  
pp. W292-W297 ◽  
Author(s):  
Sahar Shiraj ◽  
Hee Kyung Kim ◽  
Christopher Anton ◽  
Paul S. Horn ◽  
Tal Laor
Keyword(s):  
Young Adults ◽  
Spatial Variation ◽  
Relaxation Times ◽  
In Vivo Study ◽  
T2 Relaxation ◽  
Patellar Cartilage ◽  
Children And Young Adults
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