RESUMO
Objective To measure the sternal angle corresponded to thoracic plane by three-dimensional reconstruction of spiral CT , and to explore the accurate positioning methods and the preoperative assessment of cervicothoracic junction lesions .Methods Selected 42 cases of normal bone mass , 48 cases with bone loss , and 60 cases of osteoporosis who were diagnosed by dual-energy X-ray absorptiometry , and measured the location of thoracic sternal angle corresponded to the thoracic spine and thoracic kyphosis angle through the volume recon -struction data of the 16-slice spiral CT chest examinations .Results The range of sternal angle corresponded to thoracic plane was measure-ment units ⅢtoⅥ.The measure unit Ⅳwas the most, accounting for about 55%.There was no statistical significance between the position of sternal angle corresponded to thoracic plane and the relationship of bone mass , which required further study .The position of sternal angle corresponded to thoracic plane was associated with the thoracic kyphosis angle .The larger the thoracic kyphosis angle , the lower the corre-sponding position was .Conclusion The thoracic segment corresponded to the sternal angle is not a constant or accurate plane , which is not properly concerned as an accurate positioning mark to the thoracic segment .The measurement of the thoracic sternal angle was corresponded to the thoracic spine location , and its co-relationship evaluation between the thoracic kyphosis angle was vital for the accurately positioning of cervico-thoracic junction area lesions , the pre-assessment methods of surgical treatment , approach selection , and different methods for ster-num and other such contents .This research was of important clinical significance .
