Sentence examples for landmarks are difficult from inspiring English sources

Variation in ROI position can lead to differences in quantitative outcomes, and this is compounded when reference landmarks are difficult for an operator to discern.

Even simple anatomical landmarks are difficult to identify in shapes which are as rounded and unstructured as a breast.

When the dataset is large or landmarks are difficult to place, a functional data form may be preferred, as described by Ramsay and Silverman (2005).

Ultrasound may be particularly useful in neonates who have small interspinous spaces as well as obese patients where palpation of anatomical landmarks is difficult.

[ 18] It is recognized that precise tibial component axial rotation relative to anatomic landmarks is difficult to achieve.

Many computerised tomography (CT) measurement techniques rely on landmarks that are difficult to reproduce, and none measure all types of mal-positioning in a single protocol.

This is keeping with findings of other studies that have suggested greater error in landmarks that are difficult to see and those involving the labial fissure [34].

The following are situations in which an inexperienced physician might feel that it is safer to conduct a surgical tracheostomy than a PDT: emergency tracheostomy tube placement; anatomical landmarks that are difficult to palpate (very obese, short or bull neck, enlarged thyroid, nonpalpable cricoid cartilage, or gross deviation of the trachea); and malignancy at the site of tracheostomy.

Ultrasonography can be applied to identify and potentially block the superior laryngeal nerve as part of the preparation for awake fibre-optic intubation when the landmarks for palpation are difficult to identify.

These major landmarks are very difficult and expensive for football clubs, local authorities and communities to achieve.

Patients in whom bony landmarks of the spinous processes are difficult to palpate.