Webrecords were obtained for 228 patients, of whom 185 (81.1%) received tangent-only treatment. Among 142 with sufficient records to evaluate tangent height, high tangents (cranial tangent border 2 cm from humeral head) were used in 50% of patients (33 of 66) randomly assigned to ALND and 52.6% (40 of 76) randomly assigned to SLND. WebMar 1, 2024 · The use of high tangents was clinically determined during centralized review. For those patients with ≥3 positive sentinel lymph nodes undergoing axillary lymph node dissection, regional nodal irradiation was encouraged, especially in those with extracapsular extension, nodal ratio >20%, high-grade disease, and lymphovascular space invasion. ...
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WebJan 7, 2010 · 1.2.1.2. Loss Tangent. 1.2.1.2. Loss Tangent. Loss tangent (tan (δ)) is a measure of signal loss as the signal propagates down the transmission line. Material datasheets and PCB manufacturers commonly refer to this signal loss as the dissipation factor (Df). tan (δ) or Df is the result of electromagnetic wave absorption by the dielectric ... WebFeb 7, 2011 · Furthermore, with relatively minor adjustments to these fields (ie, making the tangents 1-2 cm higher in length and 1 cm deeper in the cranial corners -- sometimes called a "high tangent" technique), these fields can include most of the same volume that is treated with a completion axillary dissection. fms securite
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Forty-one patients were identified who were planned with high tangents using two tangentially opposed beams in the prone position. Patient characteristics are described in Table 1. The median patient age was 62; 46% of patients had left-sided breast cancer. Most patients had invasive ductal carcinoma … See more The mean coverage of the level I and level II axilla defined as the percent volume covered by 90% of the prescription dose was 88.7% (range 30.5–100%, standard deviation 17.9) and 40.0% (range 0–93.1%, standard deviation … See more Outcome data was available for 38 of 41 patients. Two patients were excluded as they did not complete the intended treatment course. One … See more The average of the mean cardiac dose for all patients was 0.87 Gy (0.13 Gy for the left breast and 0.05 Gy for right breast, p< 0.001). The average heart V5Gy was 0.8%, and the average heart … See more Toxicity data was available for 38 of the 41 patients. The median follow-up was 25.6 months since the start of RT. Maximal grade of toxicity throughout the treatment and at a 1-month follow-up with radiation oncology … See more WebMar 30, 2024 · irradiation. High tangents are used with supine treatments in patients with the low-volume nodal disease to increase nodal coverage while minimizing toxicities. Our … WebNov 10, 2014 · Among 142 with sufficient records to evaluate tangent height, high tangents (cranial tangent border ≤ 2 cm from humeral head) were used in 50% of patients (33 of … fms seattle