# 3D Ultrasound Mosaic of the Whole Shoulder: A Feasibility Study
## 3 Results
### Mosaic Assessment (Expert Analysis of Structure Demonstration)  
Table 4 shows the evaluation of the 20 clinically relevant structures in the US mosaic by the first clinical sonographer. The sonographer's final average grade for each anatomy with the MRI overlays was as follows: bones = 2, muscles = 3, tendons = 3, ligaments = 4 and post-glenohumeral labrum/joint = 4. Table 5 illustrates the evaluation by the second sonographer that was only involved in the assessment process. The corresponding final grades were as follows: bones = 2, muscles = 3, tendons = 3, ligaments = 5 and labrum = 5. Visual demonstrations of all 20 structures in the US mosaic in addition to MRI bone and muscle  
Figure 4: Anterior view of the US mosaic overlaying the bony segmentations of the MRI, focusing the 3 planes on the humerus. Figure 5: An (**a**) anterior (**top**) and (**b**) superolateral (**bottom**) view of the US mosaic overlaying the bony segmentations of the MRI. segmentation overlays are illustrated in Appendix A, Table A1. There was a substantial agreement between the two sonographers on the demonstration of the 20 structures as shown in Table 6.  
\begin{table}
\begin{tabular}{l l l l l l} \hline \hline \begin{table}
\begin{tabular}{l l l l l l l} \hline \hline
**Sonographer 2 Assessment** & & & & & & \\ \hline
**Anatomy** & **US Grade** & **US Comments** & **MRI Grade** & **MRI Comments** & **Muscle Grade** & **Muscle Comments** \\ \hline \hline
**_Bony Anatomy_** & & & & & & \\ \hline ACJ & 2 & Best seen in A & 2 & Bone contour easily seen & 2 & \\  & & Humeral head not & & & & \\  & & continuous at region of & 1 & Easily measured with & 1 & \\  & & measurement & & MRI bone outline & 1 & \\  & & & & Bone does not line up & & \\  & & & with US groove. US & 3 & \\  & & & & humerus is more & 3 & \\  & & & & internally rotated & \\ Spinoglenoid & 3 & & 3 & Same to no & 3 & More confusing to find \\ Notch & & & & improvement & & \\  & & Not aligned so difficult & & Mild non-alignment & & \\  & & to see & & of coracoids & & \\  & & Humerus neck-3 & & Humerus neck-2 & & \\  & & Humeral head-3 & 3 & Humerus neck-2 & & \\ Scapula and & & Scapula Coracoid-3 & & Scapula Acromium-3 & & Humeral head-3 \\  & & & Sepula Coracoid-3 & & Scapula Coracoid-2 & \\  & & Spine of Scap-3 & & Spine of Scap-3 & & \\  & & Claviole-4 & & Claviole-4 & & \\ \hline
**_Findons_** & & & & & \\ \hline
**Biecps** & 4 & Poorly seen. & 4 & & Axial/transverse in & \\  & & & & groove, but & 3 & \\  & & & & not longitudinal & & \\  & & & & Humerus rotation & & \\ Subscapularis & 3 & & & & \\  & & & & & slightly limits & \\  & & & & alignment, otherwise & \\  & & & & good. & & \\  & & & & Definitely need the & & \\ Supraspinatus & 4 & Poorly seen & 3 & bones to help & 3 & Easiest, but still not \\  & & & & identify region & & adequately seen \\ Infraspinatus & 5 & Not identified. & 3 & Massive improvement & 3 & More difficult \\  & & & & with bones & \\ Teres Minor & 5 & Not identified. & 5 & Not identified & 5 & \\ \hline _Muscles_ & & & & & \\ \hline Infraspinatus & 4 & & 3 & & 3 & \\ Teres & & & & 5 & Not identified & 4 & \\ Minor/Major & & & & & \\ Supraspinatus & 3 & & 2 & Definitely easier & 2 & \\ Trapezius & 3 & & 3 & No change & 3 & \\ Deltoid & 4 & & 4 & & 3 & More visible, not fully \\ Subacromial/ & 2 & & 2 & No change & 2 & \\  & & & & & \\ \hline
**Ligaments** & & & & & & \\ \hline CAL & 3 & & 3 & & Malayignment of & 3 & More difficult to find \\  & & & & coracoid & 3 & with bone overlay \\ CHL & 5 & Not identified & 5 & & 5 & \\ GHL & 5 & Not identified & 5 & & 5 & \\ \hline
**Other** & & & & & & \\ \hline Post- & & & & & & \\ Glenohumer & & & & & \\ Labrum/Joint & & & & & \\ \hline \hline \end{tabular}
\end{table}