直肠癌 MRI 多目标精确分割及靶区自动勾画软件进展

（1）Simple ITK-SNAP

多个绘画区域相互独立。

class Canvas(QtWidgets.QLabel):
    def __init__(self):
        super().__init__()
        self.clear(Qt.yellow)
        self.last_x, self.last_y = None, None
        self.pen_color = QtGui.QColor('#000000')

    def clear(self, color):
        self.background = QtGui.QPixmap(self.width(), self.height())
        self.background.fill(color)  # 背景
        self.paintboard = self.background
        self.setPixmap(self.paintboard)   # 在这张图像上画

    def mouseMoveEvent(self, event):
        if self.last_x is None:  # First event.
            self.last_x = event.x()
            self.last_y = event.y()
            return  # Ignore the first time.

        painter = QtGui.QPainter(self.pixmap())
        p = painter.pen()
        p.setWidth(4)
        p.setColor(self.pen_color)
        painter.setPen(p)
        painter.drawLine(self.last_x, self.last_y, event.x(), event.y())
        painter.end()
        self.update()

        # Update the origin for next time.
        self.last_x = event.x()
        self.last_y = event.y()

    def mouseReleaseEvent(self, e):
        self.last_x = None
        self.last_y = None

# 被监测对象使用installEventFilter()函数将自己注册给监测对象
self.canvas1.installEventFilter(self)
self.canvas2.installEventFilter(self)
self.canvas3.installEventFilter(self)
self.canvas4.installEventFilter(self)

# 监测对象实现eventFilter()函数，对监测到的对象和事件作出处理
def eventFilter(self, watched, event):
    if watched == self.canvas1:
        self.status.setText("canvas 1")
    elif watched == self.canvas2:
        self.status.setText("canvas 2")

预览医学图像数据

拖拽加载医学图像 .nii.gz 文件；

def dragEnterEvent(self, event: QtGui.QDragEnterEvent) -> None:
    if event.mimeData().hasUrls():
        # ...
        event.acceptProposedAction()

def dropEvent(self, event):
	filename = event.mimeData().urls()[0].path()  # 完整文件名
    # ...
    event.accept()