如何使用dcm4che3获取dicom的缩略图

您可以使用dcm4che3提供的ThumbnailExtractor类来获取DICOM图像的缩略图。您可以使用以下代码：

import org.dcm4che3.image.ThumbnailExtractor;
import org.dcm4che3.io.DicomInputStream;
import java.io.File;
import java.io.IOException;
import java.awt.image.BufferedImage;

public class DicomThumbnail {
    public static void main(String[] args) throws IOException {
        File dicomFile = new File("path/to/dicom/file.dcm");
        DicomInputStream dis = new DicomInputStream(dicomFile);
        ThumbnailExtractor te = new ThumbnailExtractor(dis);
        BufferedImage thumbnail = te.getThumbnail();
        // do something with the thumbnail image
    }
}

请注意，您需要在类路径中包含dcm4che3库以使用此代码。

相关问题

dcm4che3生成dicom缩略图的代码

你可以使用以下代码生成 DICOM 缩略图：

import org.dcm4che3.imageio.plugins.dcm.DicomImageReadParam;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;

public class DicomThumbnailGenerator {
    public static void main(String[] args) throws IOException {
        File dicomFile = new File("path/to/dicom/file.dcm");
        File thumbnailFile = new File("path/to/thumbnail/file.jpg");

        ImageInputStream iis = ImageIO.createImageInputStream(dicomFile);
        Iterator<ImageReader> readers = ImageIO.getImageReaders(iis);

        if (!readers.hasNext()) {
            throw new RuntimeException("No DICOM ImageReader found!");
        }

        ImageReader reader = readers.next();
        reader.setInput(iis);

        DicomImageReadParam param = (DicomImageReadParam) reader.getDefaultReadParam();
        BufferedImage image = reader.read(, param);

        ImageIO.write(image, "jpg", thumbnailFile);
    }
}

这段代码使用 dcm4che3 库中的 `DicomImageReadParam` 类来读取 DICOM 文件，并将其转换为缩略图。注意，需要将 `path/to/dicom/file.dcm` 和 `path/to/thumbnail/file.jpg` 替换为实际的文件路径。

给出java代码使用dcm4che库获取dcm4chee服务的dicom文件

以下是使用dcm4che库获取dcm4chee服务的Dicom文件的Java代码示例：

import org.dcm4che3.data.Attributes;
import org.dcm4che3.data.Tag;
import org.dcm4che3.io.DicomInputStream;
import org.dcm4che3.net.ApplicationEntity;
import org.dcm4che3.net.Connection;
import org.dcm4che3.net.Device;
import org.dcm4che3.net.QueryOption;
import org.dcm4che3.net.service.DicomServiceException;
import org.dcm4che3.net.service.QueryRetrieveSCP;
import org.dcm4che3.net.service.QueryRetrieveService;
import org.dcm4che3.util.SafeClose;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
import java.util.List;

public class DicomRetrieveExample {

    public static void main(String[] args) throws Exception {
        // 连接dcm4chee服务
        Device device = new Device("retrieve");
        Connection conn = new Connection();
        conn.setHostname("dcm4chee-server");
        conn.setPort(11112);
        device.setConnection(conn);
        ApplicationEntity ae = new ApplicationEntity("retrieve");
        ae.addConnection(conn);
        device.addApplicationEntity(ae);
        device.setAssociationInitiator(true);
        device.setPackPDV(true);
        device.setTcpNoDelay(true);
        device.setConnectTimeout(5000);
        device.setRequestTimeout(5000);
        device.setReceivePDULength(16384);
        device.setSendPDULength(16384);
        device.setRspTimeout(5000);
        device.setAssociationAcceptor(true);
        device.setAsyncOpsWindow(0, 1);
        device.setMaxAsyncOpsInvoked(1);
        device.setMaxAsyncOpsPerformed(1);
        device.setStorageSCP(new QueryRetrieveSCP("*") {
            @Override
            protected void store(Socket socket, InputStream data, int pcid, String tsuid, Attributes attrs, Attributes rsp)
                    throws IOException, DicomServiceException {
                // 不存储
            }
        });
        device.startListening();

        // 检索Dicom文件
        QueryRetrieveService qrService = ae.getDevice().getQrService();
        qrService.setQueryOptions(QueryOption.RELATIONAL);
        qrService.setRetrieveTimeout(10000);
        qrService.setCMoveDestination(conn.getCalledAET());
        List<String> studies = qrService.queryStudies("*");
        for (String study : studies) {
            List<String> series = qrService.querySeries(study, "*");
            for (String serie : series) {
                List<String> instances = qrService.queryInstances(serie, "*");
                for (String instance : instances) {
                    // 获取Dicom文件
                    DicomInputStream dis = null;
                    FileOutputStream fos = null;
                    try {
                        dis = new DicomInputStream(qrService.retrieveInstance(instance));
                        Attributes attrs = dis.readDataset(-1, -1);
                        // 保存Dicom文件
                        File outputFile = new File("path/to/output/file.dcm");
                        fos = new FileOutputStream(outputFile);
                        fos.write(dis.readBytes());
                    } finally {
                        SafeClose.close(fos);
                        SafeClose.close(dis);
                    }
                }
            }
        }

        // 断开连接
        device.stopListening();
        device.unbindConnections();
    }

}

这个示例演示了如何使用dcm4che库从dcm4chee服务检索Dicom文件。首先，使用dcm4che库连接dcm4chee服务。然后，使用dcm4chee服务的QueryRetrieveService查询Dicom文件，获取Dicom文件并保存它们。最后，断开连接。

请将`dcm4chee-server`替换为dcm4chee服务的主机名或IP地址，并将`path/to/output/file.dcm`替换为要保存的文件路径。